A pet restraint system for a vehicle is provided. The pet restraint system includes a leash configured to connect to a restraint device on a pet, a wearable device comprising one of a collar and a harness configured to be worn on the pet and connected to the leash, a retractor device coupled to the leash and configured to be secured to a support structure on the vehicle, a sensor for detecting an expected condition of the vehicle, and a controller for controlling the retractor to retract or lock the leash based on the determined expected condition of the vehicle.