<p>Another thing: Major cities are big, and it can take more than 30 minutes to get to different parts of the same city. So it really depends where you want to go.</p>
<p>I might be able to get from SUNY Purchase to the tip of the Bronx in 20 minutes (assuming no traffic obstructions) , but to get to some generic "New York, NY" point, (which Mapquest says is actually on the Lower East Side, don't know why) , it takes 47 minutes (assuming no traffic obstructions).</p>
<p>Northwestern might be right next to Rogers Park, but Mapquest says it takes 31 minutes to get from there to the edge of The Loop downtown- assuming no traffic obstructions, which of course is rarely the case.</p>
<p>So it depends where you want to go in the city. You probably don't want to use just the closest point as per the Bronx case. Unless the tip of the Bronx, or Rogers Park, are actually the destinations of interest.</p>
<p>You might want to specify time to get to the major employment area within the city, and then time to get to the major nightlife area for college students within that city. Like maybe in NYC, midtown and Greenwich village, respectively. Or in Chicago, the Loop & maybe Lincoln Park? (I'm out of touch here).</p>
<p>Up to OP.</p>