YELLOWSTONE NATIONAL PARK -

Yellowstone National Park is giving visitors to the park this fall a heads up on some significant road construction work that will result in long detours.
    
The National Park Service says the road work involves two sections of Yellowstone's Grand Loop Road that will be closed due to construction after the Labor Day holiday weekend.
    
The road linking Old Faithful with West Thumb and Grant Village will be closed for the season starting on Sept. 2.
    
In addition, the road from Mammoth Hot Springs to Norris will be closed starting Sept. 14.
    
The road construction will cause detours that will add up to two hours or more along parts of the route.