An acceleration communication system may communicate acceleration information about a vehicle to person not in the vehicle. A lighting system may be configured to be attached to the outside of the vehicle. An acceleration detector may be configured to detect acceleration of the vehicle. A light controller may be configured to cause the lighting system to illuminate when acceleration of the vehicle is detected by the acceleration detector.A deceleration detector may be configured to detect deceleration of the vehicle. The light controller may be configured to cause the lighting system to illuminate when deceleration of the vehicle is detected by the deceleration detector in a manner that is different than when acceleration of the vehicle is detected by the acceleration detector.