Downgrade braking analysis considers grade steepness, length, brake capacity, and runaway scenarios.
Downgrade risk assessment:
Key Variables** - Grade percentage - Length of descent - Total weight being controlled - Brake type and capacity (engine brake, service brakes, trailer brakes) - Road surface and conditions
Analysis Process** 1. Calculate braking demand based on weight and grade 2. Compare to available braking capacity 3. Account for brake fade on long descents 4. Identify runaway scenarios and escape routes 5. Plan speed management approach
Risk Indicators** - Sustained grades over 6% - Descents exceeding 2 miles - No engine braking available - Drum brakes on trailer - Hot weather conditions
Mitigation Measures** - Pre-descent brake checks - Mandatory cooling stops - Speed restrictions - Engine brake protocols - Identified runaway truck ramps
The consequences of brake failure on a heavy load are severe. Conservative analysis is appropriate.