NCDOT to install advanced warning system on I-277


CHARLOTTE, N.C. - The N.C. Department of Transportation will begin installing an advanced warning system on the Interstate 277 Outer Loop between Tryon Street and Interstate 77 in Charlotte on Oct. 20, weather permitting.

This system will detect traffic data like volume and speed, alerting motorists to backups that frequently occur on the ramp from I-277 Outer to I-77 North.

Contractor Consolidated Power Inc. of Mooresville was awarded the $188,000 project.

Crews will mill and replace the existing pavement markings on the Outer Loop between Graham Street and I-77 North, and will install the detection warning system, consisting of two Microwave Vehicle Detection units and two flashing LED beacons.

The MVD units will collect traffic data and send it to a processor on site, where it will be analyzed. The result will be a message to activate one or both of the flashing beacons within the project.

Once traffic reaches speeds below 20 mph, the first beacon near the I-77 North exit ramp will activate. If traffic continues to back up toward Tryon Street, the second beacon will be activated. The contract also requires additional signage warning motorists of slow or stopped traffic.

During the project, the contractor may close a lane on I-277 from 9 p.m. to 6 a.m. Monday through Friday. Two lanes may be closed from 11 p.m. to 6 a.m. Monday through Friday. The contractor may also be permitted to close lanes on the weekends when traffic volumes will be lighter.

The project is expected to be completed by Nov. 4. For more information on the project, please contact the resident engineer at 704-845-1151.