&gt; How do you make it significantly more dense than it already is?<p>Better transportation in outer burroughs will expand the supply of housing within a reasonable commute distance.<p>Ideas:<p>* Invest more in expanding public transportation. More express buses, local buses that run more frequently and on time.<p>* Deregulate private transportation (taxis, private buses).<p>* Incentivize commutes during off-peak hours.<p>* Encourage working remotely or flexible work schedules.<p>* Find ways to get tractor-trailers out of dense areas.<p>* Actually start enforcing double-parking and jaywalking laws (this one even pays for itself).<p>* Encourage business development away from already-congested areas