The old bridge on Brannon Stand Road closed this morning at 6 am and the detour bridge is open while county workers are readying the new bridge site.
The speed limit at the construction area has been reduced to 15 miles per hour and heavy trucks over 13 tons will be restricted.
Officers will be strictly enforcing the speed limit and truck restrictions.
Officials expect the bridge to be completed around September 8th.
Road work is taking place on Westgate Parkway, starting this Monday.
The Public Works Department will be working on the section between Lonsdale and Denton Road.
There will be detour signs to help guide motorists around the closure. .
It is all part of the Westgate Parkway 5-lane improvement project.