Conrail plaque on Milford Branch

I was just running the Upper Charles Rail Trail, along the old Milford Branch of the B&A, and saw this Conrail plaque at Washington St. (Route 16). Anyone know what the numbers mean?

Sorry, picture did not attach. Here it is.

I am pretty sure this is the grade crossing ID number.

Enter 547166T and the info comes up.

https://railroads.dot.gov/crossing-and- ... mber-range

Hi
The Conrail plate is the location of the grade crossing at 4.17 miles and also the location within 3/10th of a mile of the East Holliston station, which was located at milepost 4.20 miles from Framingham, Mass.

Thanks for these informative replies.

I have an app on my phone which has a rail map, and lists every crossing in the country. It even has reports from any recorded accident with a pedestrian or motor vehicle.