Remove chicanes
Chicanes too narrow for trailers. Also they are at the bottom of a slope, so when you turn into the path you can't use any momentum to get uphills.
They are at the end of the tarmac path through Craigmillar Park, an essential route connecting Inch and Craigmillar and the only way to avoid either the Cameron Toll mess or the Craigmillar Castle Road ratrun.