- LocationTucson, AZ
- OwnerCity of Tucson
The construction of the new 4th Avenue Underpass replaces Arizona's oldest urban grade-separated roadway/railroad intersection. This new connection to downtown Tucson from the historic Fourth Avenue provides streetscape improvements, pedestrian and bicycle linkages, pocket parks, parking and retail, improved safety as well as a “gateway” to downtown. The new underpass accommodates the modern streetcar, widened ADA pedestrian walkways on both sides of the underpass, public art, and separate bicycle lanes.