We drove away from area of Spruce Street and 2nd in Philly with the key fob on top of the car roof on January 1, 2018. We just lost the grey key fob (Mazda) with a metal belt key holder. We drove around the block of Society Hill Towers to get on the highway. Not sure where it my have slid off from the car roof. The car never alerted us that we lost the key fob until we dropped a friend off in NY. The car beeped when he got out and he walked away. It made us ask him if he had our key fob. From that point, we had to not turn the car off at all until we got back home. It's tough getting gas and making a pee stop without turning car off. If anyone finds our key fob please let us know. I believe we drove out of the Spruce Street garage, turned right on Spruce Street, right on South 3rd Street, right on Locust Street, right on South 2nd street, left on Spruce Street, right on South Front Street. Thanks for your help! and reading this.