Siden oliekrisen i 1973 har adskillige lande indført nødforanstaltninger for at begrænse bilismen, enten ved at rationere benzinforsyningen eller ved at begrænse de tider i løbet af ugen, hvor man kunne køre bil.
Since the 1973 oil crisis, several countries implemented national contingency meaasures to restrict motoring, either through rationing the supply of fuel or limiting the times during the week when cars may be driven; such measures had a temporary impact on commuters' mode choice.