Using Drive-Through Road Stops
1. It's best to have both sides of the stop connected to the road network. If one side is unconnected vehicles will still use the stop and then turn around, to come back through the stop again when they leave. There must be at least one full tile on the exit from the stop to allow vehicles to turn (this is also required in TTDPatch).
Edit: from the version against r8643 (08/02/07), this is no longer a requirement. Vehicles can now turn around at the exit of a drive-through road stop. Of course, it is still better if both ends of the stop are connected.

2. Multistop bus and truck stops can be created in any combination of position and orientation. Of course there are limitations to the arrangements that can be used if vehicles are to access the stops efficiently.
3. Opponents’ vehicles can also go through your drive-through stops without stopping (and your vehicles can go through theirs). A vehicle that is not actually stopping at a drive through stop treats it as a normal road.
Continued next post (so I can add more attachments)...
Edit: New patch update at r5526. Build on slopes bug fixed. Drive-through road stops now use custom graphics. Sceenshot updated to show new graphics. If you are using the patch you will also need roadstops.grf. Just put it in your data folder, it does not require a config. file entry. 20/07/06
Note to those who download roadstops.grf: This is NOT a NewGRF file. If you use it without the drive-through road stops patch IT WILL NOT WORK. Anyone who ignores this warning and then asks why roadstops.grf doesn't work, will probably be flamed.

Zip file with updated win32 exe is now in the next post It includes roadstops.grf.
Edit: updated version against r5656. Compile warnings silenced. Connecting road bug fixed. 30/07/06
This patch is now included in the MiniIN. Find the most recent MiniIN builds for all platforms here.
Edit: patch updated against r5910. 15/08/06
Edit: patch updated against r6080. 23/08/06
Edit: patch updated against r6247. 30/08/06
Edit: patch updated against r6380. Fixed: broken build sound effect and selection window close. 4/09/06
Edit: patch updated against r6561. 28/09/06
Edit: patch updated against r6698. 08/10/06
Edit: patch updated against r6901. Fixed: bug that prevented town growth past a drive-though stop. 23/10/06
Edit: patch updated against r7071. 06/11/06
Edit: patch updated against r7130. New features: build over player owned roads, YAPF penalty for passing through stop. 11/11/06
Edit: patch updated against r7152. New feature: remove tool now removes stop and leaves road in place. 15/11/06
Edit: patch updated against r7217. 19/11/06
Edit: patch updated against r7326. 02/12/06
Edit: patch updated against r7647. 30/12/06
Edit: patch updated against r7799. 03/01/07
Edit: patch updated against r8069. 11/01/07
Edit: patch updated against r8152. 16/01/07
Edit: patch updated against r8425. New feature: in-line drive-through stops now work. 27/01/07
Edit: patch updated against r8643. New features: build on town-owned roads, turn around in road stop. 08/02/07
Edit: patch updated against r8704. New feature: NPF penalty for passing through stop. For details of other changes see my latest post. 13/02/07
Edit: patch update against r8712 and a number of small improvements (see latest post for details). 13/02/07
Edit: patch updated against r8733. 14/02/07