Stop - start technology also means these engines also have the lowest CO2 emissions in the range, resulting in low road tax costs. (carbuyer.co.uk)
Throw in low road noise levels and you have a quiet - cruising machine which makes normal - tone conversation possible even between the first and third - row passengers. (autocar.co.uk)
Could you further explain or link «drivers would have to separate, lowering road capacity»? (politics.stackexchange.com)