The paper reviews the different geometric variables needed for developing an SPF and the sources or survey methods for collecting them. In this process, the relationship between individual road geometry variables (qualitative and quantitative) and crashes is realized to exhibit mixed nature (i.e., increase or decrease). The findings of the review on road geometric variables indicated the need for further study on the interrelation between variables, understanding the influence of different variables on urban and rural roads of less importance, the inclusion of variables qualitative, which are difficult to collect, etc. From the data sources or survey methods and the type of data, we can imply that every method employed is either not able to collect all the possible geometric variables influencing crashes and their condition or expensive or timeconsuming process. Many of the techniques are also difficult to extract for larger study regions. This causes restricted study sites.