Abstract: - Due to the inherent risks and increasing complexity of modern infrastructure construction projects, delays and cost overruns have become common facts in the construction industry. Delays can lead to many negative effects such as lawsuits between owners and contractors, increased costs, loss of productivity and revenue, and contract termination. In India, several construction projects experiencing more delays which results in exceeding the initially fixed delivery time and cost. “Delay can be defined as the time overrun or the extension of time to complete the project”. This project aims to find out the most significant factors causing delays in Indian construction projects through literature review and questionnaire survey. Nowadays, highway construction suffers from delay and cost overruns, which causes traffic problems, changes of design, poor planning, disputes, cost overruns, poor safety practices and time delays. The questionnaire is to be distributed to various respondents owners, consultants, contractors, etc. and data collected through it is analysed to rank the causes ofdelays. Possible measures are suggested to avoid the delays in construction projects