&gt; While it&#x27;s true that there are surges in demand in the normal morning and evening commutes, there is still a lot of excess driving capacity that is needed for trips other than those surges, and so you only have to have enough cars to cover those peaks.<p>Do we really have excess capacity compared to the <i>peak</i> demand? Put another way, how many people own a car and <i>aren&#x27;t</i> using it at e.g. 8:50AM? At a complete guess I&#x27;d say maybe 5%?<p>(Also, given zoning and city layout, most houses are a lot more than 5 minutes away from most offices. Even if my commute is 8:20-8:50 and yours is 9:15-9:45, we&#x27;re probably both heading into the city centre from outside, so the same car probably can&#x27;t serve us both).