Tip:
Highlight text to annotate it
X
Signal-C shows R/Y/Y with 35mph limit, which is operated by R/G/R-35mph rule.
This is the speed measurement board and type-C board (upper-right).
During train's speed is being measured, the speed indicator shows funny characters.
When the train left the measurement section, the speed is indicated.
It shows 36mph.
The next train is a bit faster.
If it is over 40mph, the dot indicator lits to warn the over-speed.
50mph is over-speed !
The opposite signal shows G/R. If it is over 80mph, the dot indicator lits.
64mph is safe. The dot indicator does not lit.
94mph is too fast.
Two photo sensors are embeded on the track. Scale speed can be easily adjusted by changing the distance between these sensors.