Rt. 90 East / Greenland

Driving along Rt 495 west of Boston, there are signs for Rt. 90 (aka the Mass Pike). They indicate that Rt.90 WEST will take me to Albany NY. I know that thse signs for the Mass Pike are also displayed in Boston, as far away from Albany as you can get in the state of Massacusetts. This is very helpful, because if I were ever to go to another state a couple hundred miles away, I definitely wouldn't plan ahead so as to know in which direction to go. Instead, I would rely completely on the signs alone.