This asset uses the AJS Traffic Library (kuid2:122285:901:2) as a dependency. If the vehicle is used as auto-spawning road traffic, you will be able to adjust its ride height above the road. Nightmode lights can be set independently and also to come on in heavy rain or snow. To access traffic settings for this vehicle, simply place it on the map in Surveyor, click on the Properties (?) button in the Scenery tab, and then on the vehicle. Note that for any static scenery instances of the vehicle, nightmode will be inactive.
Read more about the AJS Traffic Library here: http://www.ajsmith.nildram.co.uk/trs/pdf/ajs%20traffic.pdf or in this forum thread: http://forums.auran.com/trainz/showthread.php?t=47765