The following lists the builtin routes in TS2010 that do not have carz on their roads:
These have no carz because the config.txt file has a carrate 0 tag.
CN Holly Subdivision,<kuid:107727:1019>
Conrail Lincoln Secondary,<kuid:107727:1144>
CSX Saginaw Subdivision,<kuid:107727:1062>
Detroit Connecting Railroad,<kuid:107727:1008>
Thueringen romance route,<kuid:121616:1001>
These have no carz because the config.txt file has a Holdcarz 1 tag.
Downtown Traction Company,<kuid2:69871:100723:1>
ECML Kings Cross - York,<kuid:447264:1019>
Harbor Master,<kuid2:69871:100709:1>
Robe River Iron,<kuid:3801:20000>
Robe River Iron,<kuid:-18:1001>
Winter in the Alps,<kuid:-1:100858>
Wirtschaftswunder DE,<kuid2:300062:1082:1>
Banks Heath,<kuid:-18:1846763756>
British Midlands 2,<kuid:-3:10172>
Highland Valley Industries,<kuid:-3:10173>
Highland Valley,<kuid:523:1013>
Niddertalbahn,<kuid2:208598:100050:6>
Hawes Junction,<kuid:69379:100411>
Northbay County,<kuid2:44700:800045:1>
Port Ogden & Northern,<kuid2:69871:100334:1>
Robe River Iron,<kuid:3801:20000>
Robe River Iron,<kuid:-18:1001>
Rosworth Vale SP2,<kuid2:5562:20011:2>
Winter in the Alps,<kuid:-1:100858>
Winter in Germany,<kuid2:143919:27565:1>
Wirtschaftswunder DE,<kuid2:300062:1082:1>
Here is a link to all the things that can prevent carz from showing up on roads.
http://forums.auran.com/trainz/showpost.php?p=393453&postcount=2
Bob