I grew up in extreme southern New Jersey. Around 1942 they cut the end of NJ off by building a canal - to provide protection for ships going up and down the East Coast so they wouldn't have to go into the Atlantic. Anyway, all the roads were simply cut through. Now, there are two of each north-south road with no indication which is which (except the house numbers, of course). You get to the end of Shunpike at the canal and you can see where it continues on the other side but you would need to backtrack and get to one of two bridges to get to the island and make your way back to Shunpike to complete its length. Townships and towns were sliced as well. Locals don't even think about it but it must be confusing as all get out to the hoards of vacationers visiting each summer.