Traffic/Road Closures

The City of Longmont Transportation System Management (TSM) develops and prioritizes safety and capacity projects to improve the transportation system. When projects take place downtown, the Longmont Downtown Development Authority keeps visitors and downtown businesses and residents informed of traffic and road closure conditions.

Current Traffic updates and Road Closures from City of Longmont.

Main St. Rehabilitation Project Travel Restrictions 2017

Main Street from 3rd Ave. - 9th Ave. will have lane restrictions from May - July 2017. View Project Information page for details.

Downtown Road Closures for 2017 LDDA Events

View a pdf file.

Downtown Concerts
Dates: Fridays, June 9; July 28; August 25
Estimated closure time: 3 - 10 p.m. (event runs 6 - 9 p.m.)

4th Ave. from Main St. to Emery St./Kimbark St. north and south of 4th Ave. 

Downtown Block Party
Date: Saturday, August 26
Estimated closure time: 1 - 6 p.m. 

Various alleys and breezeways Downtown

Other 2017 Events

Dates: Saturdays, May 20, September 16
Estimated closure time: 3 - 9 p.m. (event runs 4 - 8 p.m.)
Main St. - 3rd to 9th Ave.
4th, 5th & Longs Peak Ave. - Coffman to Kimbark St. 

Longmont Pride
Saturday, June 24
Estimated closure time: 3 - 9 p.m. (event runs 4 – 8 p.m.)
4th Ave. - Main St. and Kimbark St.

Latino Festival
Dates: Sunday, June 25
Estimated closure time: 10 a.m. - 8 p.m. (event runs 12 - 7 p.m.)
Main St. - 3rd to 6th Ave.
4th & 5th Ave. - Coffman to Kimbark St.

Boulder County Parade and Chuckwagon Breakfast
Dates: Saturday, July 29
Breakfast: 8 a.m./ Parade: 10 a.m.
Breakfast: 4th Ave. - Kimbark St. and Emery St.
Parade: Main St. & Coffman St. - 4th Ave. to Longs Peak Ave.

Halloween Parade and Trick or Treat Street
Saturday, October 28
Estimated closure time: 8:30 - 11 a.m. (parade starts at 9 a.m.)
Main St. - 3rd Ave. to Longs Peak Ave.

Veterans Day Parade Tuesday
Either Saturday before Veteran's Day or Nov. 11, 11 a.m.
Estimated closure time: 10:30 a.m. - 12 p.m.
Main St. & Coffman St. - 3rd Ave. to Longs Peak Ave.

Longmont Lights Holiday Parade
Dates: Saturday, December 9
Estimated closure time: 4 - 6:30 p.m. (parade starts at 5 p.m.)
Main St. & Coffman St. - 3rd Ave. to Longs Peak Ave.