Why do Cambridge street vendors set up in remote locations?

On the streets of Cambridge , near the MIT campus, food trucks regularly set up shop selling lunch and snacks to hungry students, staff, and other passersby. The trucks are mobile and can park in any legal, unoccupied spot. One might think the trucks would want to be where students congregate—perhaps near the MIT Great Dome at the engineering library—or where there is heavy foot traffic, like the Kendall Square subway station. But while