-Martin- released his UK Roads Pack on the BI forums.
This addon contains 5 variations of British roads, including T and X junctions, with and without yellow boxes.
The link for the unbinarized models can be found on the downloadpage!

Quote -Martin- :
I made this addon for a friend who was working on a British island some time ago. Since then I got a lot of people asking me to release this road pack so that they could use it on their islands too etc...
So finally today I got the time to put this together and release it.

This addon is ONLY for island makers and will not be visible in mission editor!

This addon contains 5 variations of British roads, including T and X junctions, with and without yellow boxes:


• City (wide), 4 lane road (2 lanes on each side)
  
• City (wide), 4 lane road (of which 2 lanes are bus lanes)
  
• City (wide), 4 lane road with bus lanes and but stops/pedestrian crossings
  
• City (2 lane) with single yellow lines and T + X junctions
  
• City (2 lane) with double yellow lines and T + X junctions
  
• Country side with T + X junctions and pedestrian crossings
  
• Various expansion segments allowing 2 lane segments to be connected to 4 lane segments