Look at a map? White River Jct. If you looked at a map, you would have seen I-91 and I-89 intersect there and you may have them been able to deduce what may have been a logical route, up 91 to 89, down to 93 and back to Boston, where you said you needed to end up. Along the way, you might have seen some small, green signs along the side of the road with a series of numbers on them. The one with a 70 would be mile marker 70. I know it’s complicated but I’m sure you can figure it out.