I-25 Southbound Bottleneck Mitigation

ALERT: Construction Activities

Through late August 2020

  • There are no current closures or restrictions in place while ramp metering equipment is being procured.

Project Facts

  • Cost: $1.35 million
  • Contractor: Hamon Infrastructure
  • Timeline: March - September 2020
  • Location: Southbound outside shoulder of I-25 between I-76 and I-70 in Denver/Adams Counties

Completed auxilliary lane at I-25 and 58th

Completed auxiliary lane I-25 at 58th Ave

In March 2020, crews on this project began construction of an auxiliary lane along southbound I-25 between I-76 and I-70. Work included

  • constructing new roadway shoulder
  • adding dowel bars into existing concrete pavement
  • signage and striping
  • construction of a ramp meter at the 58th Avenue interchange

Traffic Impacts

CDOT anticipates low to medium impact to traffic during the ramp metering phase of the project. These include:

  • Single lane and shoulder closures will exist at the 58th Avenue on-ramp to southbound I-25 during daytime and overnight hours. Signage will be in place to alert motorists.

All construction schedules are weather dependent and subject to change.

Work Schedule

  • Working hours are 7 a.m. to 5 p.m.
  • Some night work will occur between 8 p.m. and 6 a.m.
  • No work is expected to be performed over weekends or on observed holidays.

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