I am trying to find a database of all of the Mile Markers on Interstate 80 from New York to the farthest West one in California. GPS coordinates and altitude of each individual mile marker would be great. I am going to GOOGLE it tomorrow but I was hoping some of you might have done it already. To make it metal related aren't most mile markers made of metal? Databases of all of the Interstates in the USA would be interesting also. I understand several states have done this, MA being one, but I wonder if all of them have.
DL