Amtrak Signal Question

[chapmaja]

I have a question about the signals in and around Dexter / Chelsea. I know the signals at the ends of the Chelsea siding are always lit, but they seem to be the only ones. How long before a train comes do the other signals on the line, such as 44E/44W along Huron River drive become lit?

[Tom49801]

Sounds like that line has "Approach Lit" wayside (intermediate) signals that stay dark until an approaching train is one signal block away. It will light up when a train passes the signal location before the dark signal (supposed to extend signal bulb life). Controlled sidings & Interlocking signals are always lit.