Bridge authorities may require analysis, notification, or special crossing procedures for heavy loads.
Types of Bridge Authority
State/Provincial DOT
- Most common authority - Standard permit process typically covers - Analysis required for heavy loads
Railroad
- Separate authority from highway - May require notification or permit - Crossing timing may be restricted
Toll Authorities
- May have different weight policies - Separate permit or fee structure - May require escorts
Local/Municipal
- Often on secondary routes - May have lower standards or limits - Coordination through local permit process
When Analysis is Required** - Loads exceeding legal limits significantly - Unusual axle configurations - Loads approaching posted limits - Bridges in poor condition
Analysis Process** - Submit load configuration to authority - Authority evaluates bridge capacity - May require licensed engineer analysis - Results in approval, denial, or conditions
Crossing Procedures** - Speed restrictions on bridge - Lane positioning requirements - No stopping on bridge - May require traffic control