A weekend-long repaving of Sunset Boulevard through the eastern end of Echo Park has left motorists looking for alternative routes around the project. Crews this morning tore up Sunset between approximately Figueroa Street on the east and Douglas Street on the west. But eastbound traffic is blocked at Sunset and Echo Park Avenue. Crews are scheduled to return early Sunday to pour and press and new layer of blacktop into place, said several workers. Metro bus riders should also prepare for detours and delays, according to the MTA.