4.3.4 – Speed on Curves Crashes on curves that kill people and destroy buses result from excessive speed, often when rain or snow has made the road slippery. Every banked curve has a safe "design speed" In good weather, the posted speed is safe for cars but it maybe too high for many buses. With good traction, the bus may rollover with poor traction, it might slide off the curve. Reduce speed for curves If your bus leans toward the outside on a banked curve, you are driving too fast. 4.3.5 – Railroad-highway Crossing Stops Stop at RR Crossings Stop your bus between 15 and 50 feet before railroad crossings. Listen and look in both directions for trains. You should open your forward door if it improves your ability to see or hear an approaching train. Before crossing after a train has passed, make sure there isn't another train coming in the other direction on other tracks. If your bus has a manual transmission, never change gears while crossing the tracks. You do not have to stop, but must slowdown and carefully check for other vehicles At streetcar crossings. Where a policeman or flagman is directing traffic. If a traffic signal is green. At crossings marked as "exempt" or "abandoned"