Northbound: Terminal Access. Southbound: No trucks over 7 tons allowed. For deliveries in downtown Castroville, ntinue south on Route 1, exit on Molera Rd, cross freeway, go northeast on Rte 1 to 156, exit at 183. 186: IMP: 1.60 : South end of All American Canal Bridge : IMP: 1.63: North end of All American Canal Bridge : 11 (.pdf) 20-ton weight limit on the All American Canal Bridge