When I play the 64-bit version and I try to drive on the VNHRR route is crashes and gives me this error message Saved log to... C:\Program Files (x86)\Steam\steamapp\common\Railworks\Tempdump\ Exception Code 0xC0000005 Exception info ACCESS VIOLATION Please contact our Customer Support team at https://dovetailgames.kayako.com
I found a fix posted by the creator of the route on Railworks America, so I guess I'll do my part and pass it on. Navigate into your RailWorks/Assets folder and find the provider called "VNHRR" and click on the product "Springfield". Go into the scenery folder there and delete the sub-folder called "global". Make sure you back up the Springfield folder before you delete the Global folder!
Glad to hear it worked. I'm not certain, but for some users, the Feather River Canyon route has the same problem, and the fix is the same.