Glenn Highway and Seward Highway drivers will be seeing big traffic detours on construction projects this weekend, with the latter lasting through the season.

On the Glenn Highway, the overpass at the Peters Creek exit will be closed for work, in both directions, beginning at 8 p.m. on Friday.

Shannon McCarthy, a spokesperson for Alaska DOT, says the work is extremely difficult to do while traffic is still using it. The work is for the Glenn Highway Pavement Preservation project. Lane closures during the day through the last week, and speed limits down to 35 mph in that area, have facilitated some of the work

Traffic will be detoured around the overpass on the on and off ramps, crossing Ski Road and Voyles Boulevard.

In Anchorage, New Seward Highway traffic between Dowling and Dimond, will see some of the long-term detours go into place as construction crews work to widen the highway.

Southbound drivers will be routed to Homer Drive, which has been upgraded to handle more traffic. The speed limit for that portion will be 45 miles per hour. The detour will last through the remainder of the construction season.

Glenn Highway drivers have already been driving through the Muldoon interchange construction zone daily.

, which shows current and upcoming road projects and closures.

Anchorage Police issued a press release and are holding a press conference Thursday afternoon to remind drivers that traffic fines double in construction zones. The release said the APD Traffic Unit is concentrating its efforts on enforcing speed limits in construction zones.

The department gave an example that said a fine for driving 70 mph in a 35 mph zone would normally be $1,050, but in a construction zone would be $2,100. Driving 20 miles over the speed limit normally warrants a $360 fine, but in a construction zone would be $720.