LOCALTDOT using pavement shield markings to help drivers choose lanesThe Tennessee Department of Transportation has began using pavement shield markings to help drivers choose the proper lane of travel. Each pavement shield cost about $2000 and is affixed with heat to the asphalt surface. The pavement shields have a special friction surface so motorcycles can safely drive over the markers. These signs are on Interstate 40 westbound marking the exits for 17th Street Western Ave and Alcoa Hwy Airport exit Wednesday, Oct. 26, 2016.MICHAEL PATRICK/NEWS SENTINELThe Tennessee Department of Transportation has began using pavement shield markings to help drivers choose the proper lane of travel. Each pavement shield cost about $2000 and is affixed with heat to the asphalt surface. The pavement shields have a special friction surface so motorcycles can safely drive over the markers. These signs are on Interstate 40 westbound marking the exits for 17th Street Western Ave and Alcoa Hwy Airport exit Wednesday, Oct. 26, 2016.MICHAEL PATRICK/NEWS SENTINELThe Tennessee Department of Transportation has began using pavement shield markings to help drivers choose the proper lane of travel. Each pavement shield cost about $2000 and is affixed with heat to the asphalt surface. The pavement shields have a special friction surface so motorcycles can safely drive over the markers. These signs are on Interstate 40 westbound marking the exits for 17th Street Western Ave and Alcoa Hwy Airport exit Wednesday, Oct. 26, 2016.MICHAEL PATRICK/NEWS SENTINELThe Tennessee Department of Transportation has begun using pavement shield markings to help drivers choose the proper lane of travel. Each pavement shield cost about $2,000 and is affixed with heat to the asphalt surface. The pavement shields have a special friction surface so motorcycles can safely drive over the markers. These signs are on Interstate 40 westbound marking the exits for 17th Street Western Avenue and Alcoa Highway exit Oct. 26, 2016.MICHAEL PATRICK/NEWS SENTINEL