The Arizona Department of Transportation and Federal Highway Administration are working to improve the existing traffic interchange at Interstate 19 and Ajo Way in Tucson. Construction on the two-part project began in March 2016 and will improve traffic efficiency and safety for the motoring public.
Project I, supported by $54.2 million in federal and local funds, will include replacement of the existing traffic interchange with a Single-Point Urban Interchange (SPUI) over I-19. The new interchange will feature a widened Ajo Way bridge over I-19 with a single set of traffic signals controlling traffic entering and exiting the interstate rather than signals at multiple locations.
The SPUI will include new on- and off-ramps to I-19 and noise walls to buffer adjacent residential and commercial areas from construction and from traffic noise generated by the interstate.