During the third implementation period, the RTA reached the following major milestones:
- Completion of Sunset Road, from Silverbell to River roads, including a bridge over the Santa Cruz River.
- Ruthrauff Road and Interstate 10 interchange construction began early 2020.
- Improvements to Broadway Boulevard from Camino Seco to Houghton Road - completed spring 2020.
- Construction completed on new twin bridges over the Union Pacific Railroad (UPRR) on Houghton Road as part of the Houghton Road Corridor Improvement Project, from Tanque Verde Road to I-10.
- Construction on Houghton Road from UPRR to I-10 – completed.
- Construction of Ina Road/I-10 traffic interchange – completed.
- Colossal Cave Road Improvements – completed.
- Construction on Broadway Boulevard from Euclid Avenue to Country Club Road began early 2020.