awa, if you drove, you could, for the same commuting time, look for work in a town further away. You will no doubt now say it will take the same time, but strangely is not borne out by my experience.
Just drivers are limited by their imagination in getting around without a car, I do feel non-drivers already have in-built limits in their horizons which, whether they realise it or not, are dictated by the inherent constraints (in terms of feasibility, time, options, ease) of their mobility.