 NY 16 joins the US 20A and NY 78 concurrency as it proceeds west on Main Street , becoming the main commercial thoroughfare through the village . The routes cross over railroad tracks in the center of East Aurora , returning to the residential street it was earlier , which reverts at Center Street . Several blocks to the west , US 20A , NY 16 and NY 78 enter a roundabout at the western end of East Aurora , where US 20A forks southwest on Hamburg Street , while NY 16 and NY 78 join up with CR 572 ( Buffalo Street ) and proceed northwest out of the village . Now in the town of Aurora once again , NY 16 , NY 78 and CR 572 proceed northwest past Knox Farm State Park , <unk> with CR 377 ( <unk> Road ) . At CR 377 , the moniker changes from Buffalo Street to Seneca Street as NY 16 , NY 78 and CR 572 enter the town of Elma . 
