Looking at that seven lane road made me think of a fake Aston Expressway - a unique stretch of motorway in the UK as it spends a couple of miles as a seven lane single carriageway.
Of course, in the real version, the configuration is usually 3+1+3 (with the centre lane restricted to all traffic, thus the road behaves like a six lane dual carriageway), but during mornings and evenings, tidal flow sets in, whereby overhead gantries change the arrangement to 4+1+2 or 2+1+4.
Somehow, I doubt that would be possible in SC4 without a major rewrite of the traffic simulator (a coding nightmare!) and probably several hundred lines of EXE code as well - so beyond the scope of even the most dedicated BATters.