Railtypes & Bridges

[wallyweb]

Question moved from this post.

I have a bridge named "X" that I want to be exclusive to railtypes.
Default rail types (RAIL, ELRL, MONO, MGLV ) should use the bridge named "Y".
Is there a variable that can be accessed via an Action 7 that would return whether or not a rail type is default (RAIL, ELRL, MONO, MGLV )?

[planetmaker]

No, that doesn't exist. A bridge is available for all road and rail types, including default ones as well as NewGRF-defined. Or not available at all.

[wallyweb]

...

I was afraid of that. Oh well. Time to try a different tactic.
Thanks for the fast reply.