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- A vehicle’s engine uses 73% more horsepower to cruise at 60 MPH than at 50 MPH, 159% more horsepower at 70 MPH
- - Each mile per hour over 50 MPH increase fuel consumption by 1.5%
- Tire wear will almost double at road speeds of 70 MPH or greater
- - An increase in average speed from 60 MPH to 70 MPH increases maintenance costs by 80%.
- - At 70 MPH, stopping distance is 63% greater than at 50 MPH. Higher speeds greatly increase accident probabilities.