Commuters to downtown Salt Lake City already have I-15 and light-rail construction to contend with.

Friday, if they drive to work, they'll have the Days of '47 Parade and the Deseret News Marathon to maneuver around, too.Here's a look at downtown road closures that will confront drivers Friday morning:

Days of '47 Parade: The entire parade route will be closed to traffic from 6 a.m. until about 11:30 p.m. The route is as follows: South Temple from Main Street to 200 East, 200 East from South Temple to 900 South, 900 South from 200 East to 600 East, and 600 East south to Liberty Park.

Three streets will serve as staging areas and will be closed from 6 a.m. until about 10:45 a.m.: Main Street between 200 North and 100 South, West Temple between North Temple and 200 South, and 100 South from West Temple to State Street.

Deseret News Marathon: The marathon begins at 5 a.m., and a 10K starts at 6:15 a.m. The final runners are expected to complete the marathon around 11 a.m. During the races, the following restrictions will be in place:

On Foothill Boulevard from the canyon to Wasatch Drive, and Wasatch Drive from Foothill Boulevard to North Campus Drive, one westbound lane will be closed to traffic.

On North Campus Drive, from Wasatch Drive to 100 South, one lane (westbound and then southbound as the road bends) will be closed to traffic.

On Wolcott Street, one northbound lane will be closed to traffic.

On South Temple and 100 South, one eastbound lane will be closed to traffic.

Light-rail construction: Main Street is closed between 100 South and 400 South, although the intersection of 300 South and Main Street is open. The Main Street intersections of 500 South and 600 South are partially closed. South Temple is closed except to local traffic between Main Street and West Temple.

Other construction: The outside lane of southbound E Street will be closed between South Temple and Third Avenue, 7 a.m.-5 p.m.