Shreveport police are still on the scene of an accident in which an 18-wheeler hauling asphault overturned. No injuries have been reported, but officers are blocking the exit ramp from I-220 East to northbound North Market. Drivers who were planning to head that way will have to go into Bossier City, turn around and come back to North Market and exit from the westbound lanes of I-220. Dispatchers are saying it could take a couple of hours to get the mess cleaned up. Stay with 710 KEEL for the latest.