An overturned gravel truck shut down Route 6/202 in Cortlandt today, blocking the road in both directions and dumping rocks across the roadway. Police say the accident happened shortly after 10 a.m. near the Bear Mountain Bridge. The truck, weighing more than 110,000 pounds, was traveling south when it apparently flipped over on a curve in the road. The driver survived and was taken to the hospital. Front loaders were brought in to remove the debris, but tow truck operators struggled to push the overturned truck upright. "Responding up here gets very difficult," says Assistant Chief Ray Stretz, of the Continental Village Fire Department. "As you can see, it's a very tight, one-lane road." State police say speed may have been a factor in the accident.The road was reopened earlier this evening.