Upgrade traction assessment:

**Key Variables** - Grade percentage - Length of climb - Gross combination weight - Available horsepower and torque - Drive axle configuration - Road surface and conditions

**Analysis Process** 1. Calculate power required to maintain speed on grade 2. Compare to available power at wheels 3. Account for traction limits (weight on drives, surface friction) 4. Consider momentum requirements (rolling start vs dead stop) 5. Identify stall recovery options

**Risk Indicators** - Grades exceeding 6% - Limited run-up distance - Unpaved or loose surface - Winter or wet conditions - Stop signs or signals on grade

**Mitigation Measures** - Speed management for momentum - Traction aids or chains - Alternative lower-grade routes - Pusher vehicle assistance - Traffic control for run-up

A stalled load on a grade creates cascading problems: blocking traffic, difficult restart, potential rollback. Prevention is critical.