Brian, I used to live on Tyson so know all about it
As for using DR as a "short cut" I think the phrase I would choose is an "alternative" its certainly not shorter than the South Circ.
There is me offering my road for use as a diversion too eh. lol
I dont however thing DR is exclusive to these problems. CR gets more than its fair share of noisy motorists, and wannabie race drivers too. Its all evil, we just all have different experiences.