We knew it! The NY Sun reports that many cab drivers chat on party lines with other taxi drivers during the shifts. What do hacks discuss on party lines? Traffic, have group prayers, try to help out other drivers who may need help. Party lines are also most popular with South Asians and Russians, in their native languages.

And while the TLC bans any cellphone usage (even hands-free) by cabbies, transportation consultant Bruce Schaller says, "If talking on the cell phone increases job satisfaction, then drivers may stay in the business longer, and experienced drivers are better drivers. Even though passengers, including myself, find it annoying, there might be some benefits."

What do you think of taxi drivers talking on the phone?

Detail of a photo by Swaneeswan