This sign on Trinity Drive near Diamond Drive points the way to three of the state highways going through Los Alamos. NM 502 actually ends at Trinity, with the main route through the city continuing on NM 501 on Diamond Drive. NM 501 goes on to end at NM 4 west of the Bandelier National Monument.
There are no Zía or circle symbols on this symbol to represent a state highway, probably because it appears to be a city sign.
This photo was taken in May 2004.