Yep, for us, all we need to know is that the max speed on our lines is 100, somewhere round three bridges. And since thats only for how far you are supposed to stand clear of the line. and TBH in those situations I'm not going to be getting out a tape measure, but just stand as far back as possible anyway.

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Just for measure, I just had to sign a new route, Havant to Southampton.
What was needed:
Stations, in order
Description of each station, such as coach length, exits, bridges, disabled access.
Signals at the stations and what they mean to you, eg route indications. Also such things as signal sighting, off indicators.
Where you were up and where you are down.
Platforms, numbers, and where to go for changing trains.
Tunnels names and lengths
Bridges and their names. This means ones over rivers etc. not every road bridge.
Level Crossings and their names
Shunts you may need to do.
Junctions. Names and where they go to/from.
Also other handy things to know. eg Woolston. Used for bus replacements into Southampton.
Where you might/ should get dispatch.
All good fun. At first you might think, i will never remember. But it soon click in and soon you will look out the window and see a tennis court and think, right, time to get ready for Plumpton, or a bus stop and think, time to get ready for Polegate, or where ever you go to, or feel a rattle in the dark and think, oh yes, such and such junction and the doors will thus open on the right at the next station.