<kuid2:45324:240006:3> ??
<kuid:506034:400575> ----> <kuid2:506034:400575:3> JR road dirt narrow 3 = built-in, but might be downloaded from Jointed Rail under freeware.
<kuid2:328583:16037:1> ----> <kuid2:328583:16037:1> JVC~(Tx-1) Grass green = built-in, but check DLS as well.
<kuid:506034:400576> ----> <kuid2:506034:400576:3> JR road dirt asphalt wide 4 = built-in, but might be available from Jointed Rail
<kuid:506034:400578> ----> <kuid2:506034:400578:2> JR road forest dirt narrow 5
<kuid:506034:173938> ----> <kuid2:506034:173938:1> JR 30ft-3-17 power line with telegraph = built-in
<kuid:506034:400579> ----> <kuid2:506034:400579:3> JR road forest dirt wide 6 = built-in, but might be available from Jointed Rail
<kuid:106916:10473> = DLS, or part of payware such as Legend of BN.
Here's the JR Roads Pack
JR Roads Pack – JointedRail.com
I'm not sure if they're all in here. Some may have come with Legend of the Burlington Northern
Note the versions. The Kuid versions. They are much higher than the ones you are looking for, so check Jointed Rail first. If you have the higher-versions, then your route isn't seeing the new ones.
You need an account to download anything from Jointed Rail.