Signals and Signs
Diagonal warning boards are warnings of speeds coming up in 2 miles
G R = clear R Y G* = approach limited - pass next signal at less than 60mph R Y G = advanced approach - pass next signal at less than 50mph R Y Y* Y R = approach medium = pass next signal at 40mph or less R R Y R = approach - next signal is stop - reduce to 30mph (40 for Amtrak and commuter trains) R Y Y L R* = appoach restricting - next signal is restricted speed R R R L R R R* R R R L R R R* R = restricted speed R L R R R NB R R R R R = stop R
Medium aspects don't mean the same thing as other signalling sysem. An aspect moved down one position means a diverge.
R G = diverging clear - maintain prescribed speed through turnout R R Y* = diverging approach medium - diverge and then pass next signal speed below 35phm R R Y = diverging approach - diverge then next signal at stop R R Y = diverging approach - diverge then another dirverge Y