Phitsanulok Mass Transit System Project (Red Line: Phisanulok University - Central Phisanulok) is one of the transportation system development projects linking main cities in the provincial areas and solving traffic problems from main cities in the provincial areas to Bangkok metropolitan area. The project objects to provide continuous, convenience and safe travel according to the Strategic development of transport infrastructure of Thailand 2015 to 2022 which assigns Office of Transport and Traffic Policy and Planning to feasibility study and preliminary design of Phitsanulok Transit System. The project is divided into 2 phases. The first phase is consisted of 6 routes of 80.5 km. and the second phase is consisted of 2 extension routes and 2 new routes of 30.1 km. The result of the feasibility study recommends to operate the first phase Red Line: Phisanulok University - Central Phisanulok which is the appropriate routes to operate first and the cabinet resolution has already assigned MRTA to implement the project.