Signal before any maneuver100 feet
Following distance (normal)2-second rule
Following — rain / motorcycle4 seconds (double)
Stop from RR (signal/gate/train within)15 feet from nearest rail
Train audible warning range1,500 feet
No passing — intersection / RR / bridge / tunnel100 feet
No passing — hill / curve clear distance700 – 1,000 feet
Pass bicyclist clearance3 feet minimum
Hydroplaning starts35 mph (standing water)
Tires lose contact (heavy rain)55 mph
Don't follow fire engineWithin 500 feet
Tire tread — replace atLess than 1/16 inch
Steering free play (power)Max 2 inches
Steering free play (manual)Max 3 inches
💡 The 2-second rule: pick a fixed point ahead. When the vehicle in front passes it, count "one-thousand-one, one-thousand-two." If you reach the point first, you're following too close. Double it in rain or behind motorcycles.