Drivers in Madison County should allow extra time for their travels Saturday if they use Interstate 270.
Starting at 5:30 AM, all westbound lanes of I-270 will be closed between Interstate 55/70 and Illinois Rte. 157. Crews will be replacing a damaged beam in the Meridian Road Bridge.
A detour is marked directing drivers to use I-55/70 west to I-255 north.
Transportation officials say the interstate should reopen by 9 PM Saturday.