Questions about regen braking (or other types of electronic braking)

Hello guys. I am currently in my last semester at Tennessee tech University and my senior project is to add a crash avoidance system to our solar powered Yamaha G2 (I believe this is the model). Is it possible to add regen braking to this cart, or any other form of electric motor braking? If so, this would be the simplest way of getting the cart to stop once it has been given the command to. Plan B is to design something to actuate the mechanical brakes, but with only a semester to do this project I don't believe I will have the time.

Thank you for your help. I will post a picture of the cart once I get it hosted somewhere so I can verify the model with you guys.