If you are traveling 50-60 mph would it be possible to safely make a complete stop at a stop sign that is approx 200ft away?

driving what? Most cars CAN stop in 150 feet from 60 but that's pretty heavy use on the brakes. trucks are closer to 200.

The Chevrolet Corvette C6 ZR1 will stop from 60 mph in a record breaking 96 feet.