In designing the construction level must consider offering fast and secure, including construction and maintenance cost as well as use values (Road User Cost) in which important points that must be considered for road projects are as follows: .
In the design of the building must consider the convenience and safety, including the construction and maintenance costs. As well as the way (Road User Cost) which issues need to be considered for road projects is as follows.
In the design of level construction must consider the convenience and safety, including ประหยัดค่าก่อสร้าง and maintenance, as well as the way. (Road User Cost), which issues to consider for road project are as follows: .