Enhancing the success of Ghanaian public road construction projects

Abstract The objective of this research paper is to determine the critical success factors (CSFs) influencing the success of public road construction projects from the perspective of a developing nation. A self-administered questionnaire was used to gather data on the extent to which critical success factors gathered from literature impact the success of public road construction projects from sector practitioners’ perspectives in Ghana. The data was then analysed using factor analysis. The study revealed that external environmental factors have the highest influence (46.23%) on public road construction project success, followed by project management factors (12.25%) while procurement-related factors have the least impact (6.97%). Public construction project management organisations and the government will now have a deeper understanding of CSFs that influence the success of public construction projects and use them as a guide to enhance the successful delivery of public road construction projects. Even though numerous studies have been undertaken to enhance the success of construction projects in Ghana, very little attention has been given to procurement-related factors. Thus, the study outcome will add value to sector practitioners and the Government of Ghana in the management of public road construction projects.

The construction industry has a significant impact on a country's economy.As evident in many nations, nearly all the key developmental initiatives have some element of construction.The construction sector's contribution to Gross Domestic Product (GDP), total capital assets, and investment in the fixed asset in developing nations is around 10%, 80%, and 50% respectively (Jekale, 2004).For instance, the contribution of the construction industry to GDP in Ghana rose from 7.6% in 1996 to 9.9% in 2011, subsequently increased to 12.6% in 2013 (GSS as cited by Famiyeh et al., 2017) and has decreased to 6.8 (Ghana Statistical Service, 2021) due to the adverse impact of COVID-19 on the construction sector.Global Competitiveness Index (GCI) which is premised on the state of a nation's infrastructure (Mejía et al., 2020) evaluates a nation's capability to offer better living conditions for its citizenry (Schwab, 2018).Infrastructure such as water supply, buildings, transport systems, power, etc contributes to better living conditions in this regard.However, it is worth noting that road infrastructure contributes significantly to trade and improved access to education, health, and social life for citizens of any nation (Amoatey & Okanta, 2017;Santoso & Soeng, 2016).This assertion is corroborated by Samanta (2015) who professed that there is a direct relationship between a nation's development and improved road access.According to Samanta (2015), road infrastructure network enhances the use of pertinent social and other infrastructure and the provision of improved rural roads results in increased agricultural production by expanding existing land use or cultivating new lands which were hitherto inaccessible.Also, Fan et al. (2005) contend that household poverty decreases by 0.22 to 0.33% per kilometer reduction to public road infrastructure access by communities.Thus, road projects improve the socioeconomic condition of beneficiary communities.
Failure of construction projects, especially road projects, continues to be a chronic issue in developing nations even though there have been significant improvements in technology and project management techniques (Famiyeh et al., 2017;Honrao & Desai, 2015;Muhwezi et al., 2014).For example, Elawi et al. (2015) and Mahamid (2017) professed average delays of 39% for construction projects and 48% for road projects in Saudi Arabia and Palestine respectively.Also, Amoatey and Okanta (2017) affirmed that 70% of road projects in Ghana had an average delay of 17 months whereas Damoah et al. (2019) reported on educational construction project abandonment.A plethora of studies have been undertaken in an attempt to address these challenges.However, critical success factors (CSFs) of public road construction projects in emerging economies are under-researched (Damoah et al., 2022).Furthermore, studies that include procurementrelated factors as a thematic group of CSFs that influence public road construction projects' success in Ghana are non-existent.
Meanwhile, Mgawe and Masanja (2014), Shehu et al. (2014), Jeptepkeny (2015), and Dagba and Dagba (2019) professed that procurement processes and practices significantly impact the success of public construction projects.For instance, empirical studies (Amoah et al., 2021;Das & Ngacho, 2017;Mwelu et al., 2019;Chan et al., 2004) revealed that procurement factors have a significant influence on public construction project success.According to Dissanayaka and Kumaraswamy (1999), effective procurement systems reduce time and cost overruns.It is further reported that strict adherence to best procurement practices results in the following benefits to project management: reduced transaction cost (Obat, 2016); increased competition (Al-moalla & Li, 2010); reduced procurement cycle times (Patel et al., 2016) and improved efficiency and transparency (Korir et al., 2015).This study, therefore, seeks to identify procurement-related factors as part of thematic groups of CSFs that influence Ghanaian public road construction projects' success to enable their coherent appreciation and application.

Literature review
CSFs play a pivotal role in the successful delivery of construction projects (Han et al., 2012).According to Yong and Mustaffa (2012), CSFs are influenced by factors such as operating environment, policies, and legal constraints and may vary from one region or one industry to the other respectively.CSFs are the inputs to project management systems that must be influenced to achieve project success (Cooke Davies & Arzymanow, 2003;De Wit, 1988).Lidow (1999) further suggests that these inputs are ducks and must be properly prepared and executed to deliver projects successfully.Success factors and failure factors serve the same objective but are opposite (Gunasekera, 2009).This implies that failure factors when addressed, as in the case of this research, result in project success.

Empirical review
In the Ethiopian construction industry, Belay et al. (2021) looked into the comparative examination of success variables in the public and private sectors.Based on the hierarchical model created through a thorough literature study, a structured questionnaire matrix was created.Then, a panel of specialists from various construction organizations, including clients, consultants, contractors, and academics, completed two rounds of the Delphi-Analytical Hierarchy Process (AHP) survey.According to the findings, the three most important critical success factors (CSFs) for private sector projects are defined project goals, contractor financial capability, and consulting company competence.However, in the public construction sector, the most important CSFs are adequate funding, a favourable political climate, and clearly defined project objectives.This and other similar studies did not logically categorize the CSFs for easy appreciation and application (Jugdev & Müller, 2005).CSFs for Public Private Partnership (PPP) infrastructure project implementation in Vietnam were evaluated by Hai et al. (2022).To represent the effects of these clusters on the implementation of PPP infrastructure projects, a theoretical structural equation model was developed.Views of 216 PPP infrastructure experts and practitioners were gathered through a questionnaire survey.The results showed that the private sector, project information, and procurement process clusters had the most influence on whether PPP infrastructure projects were successfully implemented.Also, Das and Ngacho (2017) carried out a study on Kenyan construction projects using factor analysis.The research revealed six factors namely; project-related, client-related, consultant-related, contractor-related, supply chain-related, and environment-related factors as elements influencing the performance of construction projects.The variables that make up the consultant-related, client-related, and contractor-related factors are generalized as project management factors in project management literature.These thematic groups emphasize the impact of the same variables on construction project success emanating from the actions of different public construction project stakeholder categories.Likewise, the supply chainrelated factors are the same as procurement-related factors or project procedures.In addition, research to analyze CSFs for Uganda's public road construction projects by Mwelu et al. (2019) came up with five factors using structural equation modelling.The factors are professionalism of staff, monitoring activities, familiarity with public procurement regulatory framework, perceived inefficiency of public procurement regulatory framework, and compliance with public procurement regulatory framework.Similarly, professionalism of staff and monitoring activities relate to project management factors whereas familiarity with public procurement regulatory framework, perceived inefficiency of public procurement regulatory framework, and compliance with public procurement regulatory framework relate to procurement-related factors.Thus, the most common thematic groups of CSFs that influence the success of public construction projects across developing economies are external environmental factors, project management factors, and procurement-related factors.Most of these studies affirmed that external environmental factors have the biggest impact on public construction projects' success.This could be attributed to the increasing politicization and corruption in emerging economies.
Numerous studies to determine CSFs that influence the success of public construction projects in Ghana have also been carried out.Kissi et al. (2019) used structured questionnaires to elicit the opinions of project experts in the Ghanaian construction industry as they investigated the effect of project monitoring and evaluation (M&E) procedures on project success criteria.The hypothesis-based impact of project M&E practices (constructs) on project success was established in this paper using partial least square-structural equation modeling.The findings demonstrated a direct relationship between M&E practices and the success criteria for construction projects.Likewise, Amoah et al. (2021) examined the combined influence of six factors on construction project success using qualitative comparative analysis.The study showed that combinations of human-related factors, project-related factors, project procedures, project management factors, project support factors, and external environmental factors have a direct influence on construction project success.Also, Damoah and Kumi (2018) identified leadership, management and administrative practices, resources, and external forces as factors that influence the success of public construction projects in Ghana.The composition of leadership and external resources factors are related to external environment and the management and administrative practices and resources factors are project management related.These factors were extended by Damoah et al. (2019) to include cultural factors as the study focused on educational construction projects.It is worth mentioning that local communities may resist the construction of school facilities due to their religious and traditional belief systems, unlike public road construction projects.Asiedu and Adaku (2019) investigated the causes of public construction project failure in Ghana.The study classified these failure factors as poor contract planning and supervision; change orders; weak institutional and economic environment of projects and lack of effective coordination among the contracting parties.Furthermore, Dagba and Dagba (2019) evaluated contract management procedures and procurement methods to determine how they impact Ghanaian road construction projects' performance.The study discovered that competitive, restricted, and shopping methods have a significant influence on the success of public road construction projects.The study focused on only four (4) districts in only one (1) out of the 16 regions in Ghana and only investigated the impact of procurement methods on public road construction project performance.Furthermore, the study did not capture the views of the staff of consulting firms and road agencies who are key stakeholders of public road construction projects in Ghana.Finally, Famiyeh et al. (2017) in their study identified client-related factors, consultant-related factors, contractor-related factors, and material-related factors as independent variables of project success.Again, these factors can be broadly classified as project management, external environmental, cultural, and procurement-related factors.Thus, the most common thematic groups of CSFs that influence construction project success in Ghana are external environmental and project management factors.Even though most studies in Ghana either contained vague or one (1) or two (2) variables related to procurement, not enough studies have interrogated procurement-related factors as part of thematic groups of CSFs that influence construction projects' success.Furthermore, such studies on public road construction projects do not exist.Meanwhile, there is no chance of delivering a public construction project without going through procurement as enshrined in public procurement regulations across nations.Also, Beleiu et al. (2015) postulate that success factors should be adapted to the type of project.
In light of the benefits of procurement systems, the challenge with public road construction management literature, and the significant impact of road infrastructure on nations' economies and GCI, it is imperative that studies that thoroughly probe and identify CSFs of public road construction projects in Ghana are considered.

Research methodology
This section discusses the sampling, questionnaire design, and inferential tool employed for the study.

Sampling method
The study population is public road construction projects completed within the last five years.Given the relatively small number of the study population (i.e., 290 projects) as gathered from the road departments and the high number of responses required to use factor analysis for data analysis, the census sampling technique was employed for this study.The respondents for the study were project management team members (i.e., engineers and quantity surveyors) of consultants, contractors, and clients involved in the management of the completed road projects under the road agencies.

Questionnaire design
To define and categorize the variables, the researchers used a quantitative survey methodology.This made it possible to employ much bigger samples and helps forecast the relationship between independent and dependent variables using statistical information.This allows for the generalization of a phenomenon to a larger population (Bryman, 2016;Creswell & Creswell, 2017).The design of the research questionnaire started with the review and shortlisting of success factors from literature.The compiled list was subsequently critiqued through focused group discussion by nine (9) experts in public road construction management from academia, construction firms, consultancy firms, and the public sector.The list of nine (9) experts comprised two (2) experts each from the public sector, consulting firms, and academia whilst the remaining three (3) came from construction firms.The panel was also allowed to take out irrelevant factors and also add other relevant ones that were not included in the compiled list.This is rightly so because projects are special (Mir & Pinnington, 2014) and are dependent on geographic location and socio-cultural settings (Ahsan & Gunawan, 2010).The experts were to have not less than 15 years of experience in public road construction management (Hallowell & Gambatese, 2009) and should have managed a completed public road construction project within the last five years.At the end of this exercise, 26 factors were shortlisted for the study.
The carefully developed questionnaire through a review of literature and feedback from the pilot study was issued to respondents.The seven-point Likert scale (Kim, 2010) on which the variables in the questionnaire were ranked are: 1 -strongly insignificant; 2 -partially insignificant; 3 -insignificant; 4 -neutral (uncertain); 5 -partially significant; 6 -significant; and 7 -strongly significant.Respondents were to rank the extent to which the 26 variables affected the success or failure of the completed road project they managed.

Factor analysis
Factor analysis is a statistical interrelationship tool used to describe the primary structure among variables of a research (Bandalos & Finney, 2018).The technique reduces information from a huge number of variables to smaller subsets of meaningful clusters (Hair et al., 2014;Pallant, 2020).
The use of factor analysis in construction management studies is not new.Studies such as Asiedu and Adaku (2019) and Pongpeng and Liston (2003) employed factor analysis in their analysis.The most important criterion for its consideration is the suitability of data.Fidell et al. (1996) contend that sample size and strength of association among variables are the two key issues to be examined.Considering the large number of factors for the study and the need to group the factors for meaningful interpretation, factor analysis was used as an inferential tool for this study.In this regard, the KMO and Bartlett test of Sphericity was undertaken to determine the suitability of data for this study (Hair et al., 2014).The technique uses principal components analysis and extracts factors with eigenvalues greater than unity using Varimax rotation (Lin et al., 2011).Also, the use of a scree plot further confirms the optimum number of research factor components based on eigenvalues.The Scree plot is obtained by plotting the latent roots against the number of factors in their extraction sequence and the resulting curve used to determine the cut-off point (Hair et al., 2014).According to Fellows and Liu (2021), factors with eigenvalue values greater than one are retained for further interrogation.

Results and analysis
This section discusses the response rate, background of respondents, descriptive and inferential analyses for the study.

Response rate
Out of the 606 questionnaires distributed, 457 questionnaires (75.4%) were retrieved.Eight (8) responses (1.3%) were discarded during the data cleaning process, resulting in 449 (74.1%) valid responses for data analysis.Thus, the number of valid responses is sufficient for factor analysis given that a ratio of at least 5 observations per variable is the minimum sample size requirement (O'rourke et al., 2005).The sufficient response rate is attributable to the researcher's strong network in the road sector as well as the continuous e-mail reminders, calls, and visits to respondents.The sufficient response rate may also be attributable to the clarity of the questionnaire.Hallowell and Gambatese (2009) opined that background information such as education and years of experience in the construction industry are good indicators of professional expertise as well as guarantee the validity and the reliability of study outcome (Cresswell &Cresswell, 2017 andDainty, 2008).The summary of respondents' characteristics is shown in Table 1.

Background of respondents
Of the total 449 valid responses retrieved, 133 respondents (29.6%) were Geomatic Engineers, 165 respondents (36.8) were Civil Engineers and 151 respondents (33.6%) were Quantity Surveyors.Therefore, it can be concluded that the categories of respondents' perceptions of the study variables are balanced.The data on the highest level of academic achievement of respondents showed that the respondents were highly qualified academically with a bachelor's degree as the least qualification.It also implies that respondents understood the completion of the questionnaires.Two hundred and nine (209) respondents (46.5 %) held bachelor's degrees whilst 240 respondents (53.5%) held master's degrees.Only 7 respondents (1.6%) had 6-9 years of professional experience; 268 respondents (59.7 %) had between 10-19 years of professional experience and the remaining 174 respondents (38.7%) had over 20 years of professional experience.The above table indicates the rich experience and qualification of respondents in the area of the study.

Descriptive analysis
Standard deviation is a degree of consistency and changeability concerning the understanding of variables by the respondents for a given statistical data (Motulsky, 2003).It is therefore considered important when it comes to the validity and reliability of research data (Motulsky, 2003).A standard deviation of less than 1.00 implies a low changeability and high consistency.A small standard deviation (less than 1.00) associated with the mean scores of the variables/attributes being measured suggests a low variability and high uniformity in the interpretation of variables by respondents and vice versa (Field, 2005).Thus, it can be said that the responses of the study participants were of low variability and high consistency as the standard deviations were less than 1.00 for all the variables interrogated.The details are shown in Table 2.

Inferential analysis
A value of 0.600 for the Kaizer-Meyer-Olkin (KMO) measure of sampling adequacy is considered acceptable for data to be considered for factor analysis (Hair et al., 2014).Therefore, the KMO value of 0.720 for this study is considered more than adequate to merit factor analysis.In addition, the Bartlett test of sphericity recorded an Approximate Chi-Square of 13,698.749with an associated significance of 0.000.This is clear evidence of probable relationships among the variables.Also, it is an indication of possible groupings of variables and the population matrix not being an identity matrix (Hair et al., 2014).
The variables for the study were subsequently extracted into components through Exploratory Factor Analysis (EFA).From the Scree plot shown in Figure 1, it is evident that three-factor components were expected from the EFA.These are the components with eigenvalues greater than one.
Table 3 shows the three components with eigenvalues greater than one (i.e., 7.741, 3.120, and 1.409) and further indicates that the three components account for 65.5% of public road construction project success.External environmental, project management, and procurement-related were the components with eigenvalues greater than one.Confirmatory Factor Analysis (CFA) was conducted to confirm the validity and reliability of the factors identified from the EFA.For model confirmation based on CFA; factor loading values should be higher than 0.4 (Peterson, 2000), Cronbach's alpha (α) acceptable threshold is 0.7 (Hair et al., 2014), composite reliability (CR) values should be higher than 0.7 and average variance extracted (AVE) values should be greater than 0.4 (Nunally & Bernstein, 1978).Thus, α values above the 0.7 thresholds for all the constructs α show that the factors extracted from the analysis are deemed adequate in the successful implementation of public road construction projects.The results of the factor analysis and the reliability analysis are shown in Table 4.

Discussions of results
This section discusses the critical success factors of public road projects identified by this study.

External environmental factors
External environmental factors are the most significant factors that influence the success of public road construction projects in Ghana.They account for 46.23% of public road construction projects' success.It comprises fighting corruption, favourable weather, controlled political interference, economic (stable economic conditions and economic policy), stable government, availability of materials, and availability of equipment based on the rotated factor pattern.This confirms the findings of Damoah et al. (2022), Chan et al. (2004), Das and Ngacho (2017), Damoah et al. (2019), Amoah et al., (2021), Damoah and Kumi (2018) and Famiyeh et al. (2017).Public construction projects especially road projects are highly politicized given their socioeconomic impact on communities and credit given to the government that initiated them.In this regard, a change of government negatively impacts the performance of the project leading to possible abandonment as the new government becomes more interested in pursuing its programmes and projects to win the next election (Damoah et al., 2019).Again, they report in their study that corruption and political interference are an integral part of government project implementation in Ghana and have become the norm.Payment of huge bribes to facilitate contract awards or evade regulations  is the order of the day even though there is empirical evidence of corruption being one of the leading causes of project failure.Bad weather such as rain and hot weather affects the performance of construction projects (Asiedu & Adaku, 2019;Famiyeh et al., 2017).Hot weather negatively impacts the productivity of workers due to exhaustion whereas rains disrupt contractors' work programme (Asiedu & Adaku, 2019;Famiyeh et al., 2017).Asiedu and Adaku (2019) and I. S. Damoah et al. (2019) professed that unstable economic condition is a major cause of construction project cost overrun in Ghana.The constant fall of the local currency against the dollar and pound results in high project costs of fuel, equipment, and materials which are mostly imported (Asiedu & Adaku, 2019;Famiyeh et al., 2017).Also, adverse effects of scarcity of equipment on construction project success have been reported (Damoah & Kumi, 2018;Damoah et al., 2019).Road construction equipment is very expensive and most contractors in Ghana cannot afford them, resulting in the demand for equipment by contractors exceeding the equipment supply (Akomah & Jackson, 2016).The equipment shortages undermine project success (Akomah & Jackson, 2016;Sami Ur Rehman et al., 2022).Furthermore, the use of substandard materials (Osei-tutu et al., 2010;Yap et al., 2021) and scarcity of materials (Famiyeh et al., 2017;Damoah & Kumi, 2018;Damoah et al., 2019) have all been identified as critical factors that undermine the success of public construction projects.Substandard materials affect the quality and lifespan of projects after completion.

Project management factors
Project management factors account for 12.25% of public road construction project success.They consist of six ( 6) factors namely top management support, team capability, effective planning, project management structure, cash flow, and effective supervision.These factors largely depict the essence of personnel competence and a strong administrative system in the execution of the project.According to Aje (2012) and Larson and Gray (2018), the competence of a project team is a key factor that influences project success.However, the independence of technocrats in the delivery of public construction projects is questionable (Asiedu & Adaku, 2019).Appointments in public institutions are highly political and leaders of these institutions have to act in the interest of their appointer in order not to incur their wrath (Asiedu & Adaku, 2019).Thus, even qualified technocrats are unable to follow best practices in the management of public construction projects, resulting in the acceptance of substandard jobs by consultants and clients (Damoah & Kumi, 2018;Osei-tutu et al., 2010).Also, the over-politicization of public sector organizations has led to "square pegs in round holes" and its attendant negative consequences (Asiedu & Adaku, 2019;Damoah et al., 2019).The politicization of public projects especially roads given their socio-economic impact on communities has further exacerbated the already bad situation.Governments in their attempt to please electorates by far exceed budget for road construction projects, resulting in severe payment challenges.According to Omopariola et al. (2020), cash flow is the lifeblood of construction projects and is the foremost source of project success.However, irregular cash flow is the biggest problem in the Ghanaian road sector due to the government's inability to honor interim payment certificates of contractors and consultants (Asiedu & Adaku, 2019;Damoah & Kumi, 2018;Damoah et al., 2019).The payment issues adversely affect the cost and duration of public construction projects.Payment delays result in contractors abandoning site leading to time overruns and accrued interest on delayed payments.Again, the finding that project management factors significantly influence public road construction success is corroborated by I. Damoah et al. (2022), Chan et al. (2004), Das and Ngacho (2017), Mwelu et al. (2019), Damoah et al. (2019), Amoah et al. (2021), Damoah and Kumi (2018) and Famiyeh et al. (2017).

Procurement-related factors
The study identified procurement-related factors as having the least impact on public road construction project success with a percentage of 6.97%.However, this finding is considered very significant given that effective procurement systems help to curb corruption, minimize bureaucracy and enhance auditing and transparency, resulting in efficient and effective management of public construction projects.This is more so, especially when public road construction projects are heavily prone to corruption due to their huge cost.The study established minimized bureaucratic procurement process, transparent  procurement process, procurement method, contractual terms and conditions, and works specifications as the components of procurement-related factors.The procurement method addresses the issue of contractor and consultant capacities if rightly followed.The Public Procurement Act (PPA) of Ghana stipulates thresholds for shopping, national and international bidding based on the complexity of the assignment.This is to ensure that competent contractors and consultants based on the qualification requirements for respective thresholds are engaged.Works specifications and terms of reference when adhered to ensure that contractors and consultants respectively follow best practices leading to the delivery of high-quality projects.Also, strict adherence to contractual terms and conditions, transparent procurement processes, and minimized bureaucracy reduce conflicts, boost confidence, increase competition, and facilitate the delivery of projects on time and within budget.However, the practice in Ghana is contrary when it comes to the procurement of public projects.For instance, the "standstill" period after the evaluation of tenders and public posting of contracts after award to ensure transparency and boost public confidence are not followed in the procurement of works and consultancy.Also, there is the prevalence of tempering with the contents of tender documents (Adindu et al., 2020;Osei-tutu et al., 2010;Owusu et al., 2019) due to the use of the paper-based procurement system in Ghana and most developing nations.In addition, Amoako and Lyon (2014) and Damoah and Kumi (2018) profess that bureaucracy adversely impacts the success of public projects in Ghana and the situation has not changed.Bureaucracy in these studies was discussed in relation to general administration.However, this study has added the perspective of procurement bureaucracy to the existing literature on public construction projects in Ghana.Again, Damoah and Kumi (2018) and Damoah et al. (2019) reported of the prevalence of wrong specifications in public construction project management in Ghana.Osei-tutu et al. ( 2010) and Damoah et al. (2019) mentioned that manipulation of procurement methods and contract terms and conditions for the personal gain of politicians, technocrats, and contractors is prevalent in Ghana.For example, abuse of the restricted tendering method and including client prepayment as clauses in public contracts lead to financial losses.The finding of this study that procurement-related factors influence the success of public construction projects is not surprising since this outcome is confirmed by studies (Chan et al., 2004;Das & Ngacho, 2017;Hai et al., 2022;Mwelu et al., 2019) in other economies.Even though it also confirms the finding of Amoah et al. ( 2021) in Ghana, the scope of this study was not specific to public road construction projects.Additionally, it is worth mentioning that only the procurement method and transparent procurement process comprised the procurementrelated factors for that study.With regards to public road construction literature in Ghana, it extends the finding of Dagba and Dagba (2019) by discovering four (4) factors in addition to the procurement method which was the only factor studied.Therefore, the study finding extends the literature on public road construction project management in Ghana.

Study implications
The following recommendations can be made to enhance the application of the success factors identified.

Procurement-related factors
The amendment of the current procurement act to make e-procurement, "stand still" period, and posting of contract awards mandatory for national and international competitive tenders will minimize procurement bureaucracy and enhance competition among bidders leading to value for money.The amendment will enhance real-time auditing, thus, deepening transparency in the management of public construction projects.

Project management factors
The strict compliance with the Public Financial Management Regulation by the government (PFMR) will address the severe irregular cash flows associated with public construction projects in Ghana.This is rightly so as the PFMR does not permit the government to sign a contract without an available budget.In addition, legislators of developing nations should urgently consider enacting laws to empower public construction project managers and to also establish ethical standards for the construction industry.This will further ensure professionalism, value for money and minimize shoddy work in the construction industry.

External environmental factors
Similarly, the stipulation of e-procurement, the "standstill" period, and the posting of contract awards as mandatory in the public act and their subsequent enforcement will significantly curb politicization and corruption in the management of public construction projects.Politicians and their cronies will have no choice but to adhere to the best construction project management practices.Furthermore, parliament enacting laws to make it unlawful for a project that has commenced to be abandoned by a new government will mitigate against the current high rate of abandoned projects.These measures will contribute to an improved enabling environment for public road construction project management.

Conclusion
The study revealed that: (i) External environmental factors have the highest influence (46.23%) on public road construction project success, followed by project management factors (12.25%) while procurementrelated factors have the least impact (6.97%).
(ii) Minimized bureaucratic procurement process, transparent procurement process, procurement method, contractual terms and conditions, and works specifications comprise procurement-related factors of Ghanaian public road construction projects.
(iii) The findings on external environmental factors and project management factors are consistent with existing literature on public construction projects in Ghana and other developing nations.Therefore, the study, to that extent, affirms past studies as well.
(iv) Proper application of success factors by stakeholders in the construction industry will further enhance the success of public road construction projects in Ghana.

Limitations and future research direction
The study is limited to public road construction projects in African countries with working environments and socio-economic conditions similar to that of Ghana.Hence, further research on CSFs influencing the success of private projects in emerging economies is recommended.