There are plans to reduce speed limits in towns and on rural roads. Like traffic lights, speed limits would be redundant if the rules of the road were based on equality instead of priority, if roads were designed to express a social context, if the onus were on the motorist to beware pedestrians, and if we had a driving test and highway code that embraced these essential reforms. Life is about infinite variables. Speed limits are rigid. Instead of driving by numbers, we should drive according to to context.