Normally, when a road intersects with an interstate highway, there’s one on-ramp and one off-ramp in either direction. Just north of Watertown, New York, there’s something I’ve never seen before: two on-ramps going in the same direction. At the intersection of Route 342 and I-81, traveling east, you have two options if you want to take I-81 south.
The sign directs you to a wide, looping on-ramp, but you can also just turn left and get on I-81 south much quicker. That ramp is clearly for people approaching from the west, but check it out–there’s nothing preventing drivers coming from either direction from using that ramp. Was this by design, or just a weird accident?