Phoenix Metro Area Projects

Loop 303 Improvement Project: North of Interstate 10

Traffic Alerts

Loop 303 / US 60 Interchange

Sound wall construction is scheduled to start Monday (Dec. 8) along Loop 303 north of Mountain View Boulevard in the Sun City Grand area. Crews will construct walls over the next few months to limit the level of traffic noise in the area. Other initial work starting next week will include shoulder improvements along the south side of Grand Avenue near the interchange.

Crews are scheduled to begin closing the left lanes of Grand Avenue in both directions on Wednesday, Dec. 10, starting at Sunrise Boulevard and moving north for median work. Grand Avenue traffic will be shifted to the wider south side of the roadway by early January, allowing two travel lanes in each direction between 163rd Avenue and Sunrise Boulevard.

The speed limit on this section of Grand Avenue will be reduced from 55 to 45 mph throughout the duration of the 18-month project.

US 60 to Happy Valley Parkway
  • Loop 303 will be narrowed to one lane in each direction between US 60 (Grand Avenue) and Happy Valley Parkway.

For the most current information on closures and restrictions, ADOT recommends bookmarking this page and subscribing to receive traffic alerts by email. ADOT reminds drivers to allow extra travel time and to proceed with caution through active work zones.

Loop 303 / I-10
  • Grand Avenue (US 60) will be narrowed to two lanes in each direction east of the Loop 303 connection from 7 a.m. Monday (Dec. 22) to 4 p.m. Wednesday (Dec. 24) for work related to improvements on the interchange connecting the two roadways.