For inscriptions to take place, witnesses are needed.

Brighenti, A. M. (2010). At the wall: Graffiti writers, urban territoriality, and the public domain. _Space and Culture_, 13(3), 315-332. doi: 10.1177/1206331210365283

On the northbound morning Rail Runner out of Albuquerque’s downtown station, it’s best to sit on the  left side of the train to see the art, lit by the morning sun.

Lots of people catch the train at the Montaño station, which is more convenient and less sketchy than downtown, but you miss the best art.