Surely the danger from a legal perspective is that we are leaving it to the driver to decide what kind of traffic jam he or she is in. Is it one that will be stationary for the next 20 minutes or for one minute? Would not the right hon. Gentleman’s approach open up a new range of work for lawyers: pleading specific circumstances in favour of a particular defendant? It should not be up to individual drivers to decide that they are in a particular type of traffic jam. They are either in charge of a vehicle or they are not, and the law must be clear—for good reasons.