Illinois Road and Transportation Builders Association

Formed in 1938 to promote the transportation needs of the state, the Illinois Road and Transportation Builders Association is now the largest statewide organization of companies designing, building and maintaining the state highways, transit systems, railways and aviation systems.
The core purpose of IRTBA's existence is: "to protect, improve & promote the transportation design & construction industry in Illinois." Their success is shared equally by all contractors and designers, regardless of their specialty.