Contents:

• trigger blocks (start, finish, checkpoint, and multilap, with 2-wide versions where applicable)
• effect blocks (turbo, turbo2, and freewheel)
• triangle and half-width rectangle blocks

An expansion for banjee's excellent DecoCityArena itempacks:

DecoCityArenaby banjee»UD | 3 | 2926 | 512

All credit for the set's concept and UVs go to them.

A few caveats apply!

• The arrows/crosses on effect blocks are implemented via meshes, so they can look a little nasty at intense angles due to not receiving texture filtering. If you know of a way to overlay the RoadDecalTurbo texture onto arbitrary surfaces, please dear God let me know, I spent an entire weekend trying different approaches.
• Trigger blocks use meshes from the base Arena set. I've cut out most of the mesh that gets hidden by the block, but they still end up pretty large in filesize (200-300kb each).