This is actually done in Surveyor, but it's really helpful in Driver.
You know how freight cars in a yard or on a siding will cause interactive crossings to block traffic. This is what the crossing gates are supposed to do, right! Well I've figured out how to use a bit of invisible track and an invisible switch lever to rectify this. I'm not exactly the sharpest knife in the draw a lot of times, but when something like this dawns over my head, I have to tell everyone.
Simply create an invisible junction with some invisible track as close to the crossing, but not too close to where the freight cars will be so that the junction doesn't lock.
Point the invisible track off to one side. I place the track so that by default my crossings are open when the junction lever points to the left while looking at the siding from the opposite side of the crossing or the same when looking into the yard from the throat.
With this setup, I can stuff my yard full of freight cars and still have an interactive road crossing across the yard throat.
I'm not sure how many people know about this already, so I'd thought I'd share it.
John
				
			You know how freight cars in a yard or on a siding will cause interactive crossings to block traffic. This is what the crossing gates are supposed to do, right! Well I've figured out how to use a bit of invisible track and an invisible switch lever to rectify this. I'm not exactly the sharpest knife in the draw a lot of times, but when something like this dawns over my head, I have to tell everyone.

Simply create an invisible junction with some invisible track as close to the crossing, but not too close to where the freight cars will be so that the junction doesn't lock.
Point the invisible track off to one side. I place the track so that by default my crossings are open when the junction lever points to the left while looking at the siding from the opposite side of the crossing or the same when looking into the yard from the throat.
With this setup, I can stuff my yard full of freight cars and still have an interactive road crossing across the yard throat.
I'm not sure how many people know about this already, so I'd thought I'd share it.
John
 
	 Screwy part is I discovered this in a couple of Brit wagons, wulf9 wrote a script for those to change coupling types and connect air hoses or something, and part of the script was to disable physics when the car was used as a loose consist. Justin Cornell wrote the simplified "carfizzix" script so it could be used in any freight car as a standalone script or combined with other scripts, the idea was everyone would start using it and eliminate a problem which apparently has been around since TRS2004 - hundreds of loose consists in a big route impact performance simply because the game is programmed to load and continually process the physics for every single car on the route even if it's sitting in a spur 100 miles away from the player. The "sleep script" forces the game to ignore that car and treat it as a simple scenery object until it's actually coupled into a train with an engine. Multiply that by 500 or 1000 freightcars and it's a huge performance boost.
 Screwy part is I discovered this in a couple of Brit wagons, wulf9 wrote a script for those to change coupling types and connect air hoses or something, and part of the script was to disable physics when the car was used as a loose consist. Justin Cornell wrote the simplified "carfizzix" script so it could be used in any freight car as a standalone script or combined with other scripts, the idea was everyone would start using it and eliminate a problem which apparently has been around since TRS2004 - hundreds of loose consists in a big route impact performance simply because the game is programmed to load and continually process the physics for every single car on the route even if it's sitting in a spur 100 miles away from the player. The "sleep script" forces the game to ignore that car and treat it as a simple scenery object until it's actually coupled into a train with an engine. Multiply that by 500 or 1000 freightcars and it's a huge performance boost.
