Purpose: The aim of the study was to examine effect of budget process reforms on government infrastructural projects success at the Ministry of Roads and Transport in Kenya Methodology: The descriptive type of survey research design was utilized with the population targeted being 6 staff members at the Ministry of Roads and Transport, 27 budget and appropriation committee members at the parliamentary committee and 8 Parliamentary Budget Office members (PBO) and 3 senior officials from the Kenya National Highway Authority. Census sampling technique was employed to reach the sample size. Hence, all the 44 respondents were involved in the study. A questionnaire was employed to gather information and quantitative techniques adopted for analysis. Validity and reliability of the questionnaire was tested and it had an overall Cronbach Alpha of 0.826. Statistical Package for Social Sciences (SPSS version 21) was integrated to code information gotten from the questionnaires and summarized into percentages and frequencies. The summary was then outlined in pie charts, figures, and tables. Findings: From the analysis, the study found that the major budget reform processes include accountability, enhancing public participation, and strengthening enforcement. The study established that budget reform process had a statistically significant influence on the success of government infrastructural project success. Unique Contribution to Theory, Practice and Policy: System theory can be used to anchor future studies on effect of budget process reforms on government infrastructural projects success at the Ministry of Roads and Transport in Kenya. Accountability measures should be introduced and the relevant bodies held responsible for any mishaps in the project implementation process. It was suggested that there is a need for further studies to be conducted to examine other factors impacting the government infrastructural projects success.