Sorry but pits is not totally fixed. On the right lane of pits, you still collide on other opponent and your box is not visible.
It's because object is named 1road_asfalt_white_ddsracesurface_wall43_s0. Renamed with 1pits_asfalt_white_ddsracesurface_ta3_s0 and pits behave as expected. 1pits to let it behave as a PITLANE object and also modify ta3 because previous wall43 is giving headache to AC when two keywords are used in the same object name.