This is what Philly needs:

If there was ever a city that could use an event promoting lawfulness, it's this one.

From http://en.wikipedia.org/wiki/Critical_Mass:

In San Francisco, a splinter event known as "Critical Manners," was created as a response to Critical Mass. Critical Manners rides through the city on the second Friday of the month, but in contrast with Critical Mass, the riders obey all traffic laws, such as stopping at red lights and signaling.

There are also conversations about starting Critical Manners in Portland, Oregon.