And for today, a definition.
Restricted speed for a MAX train is:
20 miles per hour or the posted speed (whichever is less)
but always at a speed that would allow the operator to stop within half their sight distance.
So for example, downtown where the speed limit is 15 mph, restricted speed would never be faster than 15, but in areas where the normal speed limit is faster, restricted speed will be a maximum of 20 mph. Conditions like thick fog that reduce how far the operator can see ahead will likewise reduce the maximum speed permitted under restricted speed.
Situations in which restricted speed would be used include -but are not limited to- any time a train is running reverse traffic (e.g. east in the westbound tracks) or after bypassing a red ABS signal, or as directed to by Control.
EDIT – I’m updating this post with clarifications after being contacted via email which made me realize I’d worded some of this unclearly. Under normal operating conditions, something like a foggy night could get a warning from Control that you should operate at a speed that you feel comfortable and safe going at, which does not mean restricted speed – if the speed limit through a foggy area is 55 but you feel safe at 40 or 50, that’s fine. It is only when Control has stated that you should operate at restricted speed that the 1/2 sight distance restriction comes into play.