Skip to main content
Calcimator

Evacuation Route Planner Calculator

Estimate evacuation clearance time from population size, road lanes, distance, and traffic-flow capacity.

Inputs

Results

Total evacuation time (hrs)

1.57

Vehicles needed2,000
Road capacity (veh/hr)2,800
Clearance time (hrs)0.71
Travel time (hrs)0.86
Phased waves recommended1
People per wave5,000
How to Use This Calculator
  1. Enter Population to Evacuate and Number of Outbound Road Lanes available.
  2. Set Distance to Safety (miles) and Average Vehicle Occupancy.
  3. Enter Average Travel Speed (mph) — use conservative estimates for congested evacuation conditions.
  4. Review Vehicles per Hour per Lane and Total Evacuation Time (hrs).
  5. If total time exceeds your warning lead time, model additional contraflow lanes or mandatory early departure.

How the result changes with Avg travel speed (mph)

Avg travel speed (mph)Total evacuation time (hrs)
7.94.51
251.91
461.37
631.19

What each input means

Population to evacuate
Total number of people in the evacuation zone.
Outbound road lanes
Total outbound lanes on all evacuation routes combined.
Distance to safety (mi)
Distance from evacuation zone to safe destination.
Avg vehicle occupancy
Average people per vehicle during evacuation.
Avg travel speed (mph)
Expected average speed on evacuation routes (often 25-45 mph under congestion).
Vehicles/hr per lane
Evacuation-condition throughput per lane (typically 1,200-1,800 vph).

What each result means

Total evacuation time (hrs)
Clearance time + travel time to reach safety.
Vehicles needed
Total vehicles required based on population and occupancy.
Road capacity (veh/hr)
Total vehicles per hour all outbound lanes can handle.
Clearance time (hrs)
Time for all vehicles to leave the zone.
Travel time (hrs)
Drive time from zone to safe destination.
Phased waves recommended
Recommended number of staggered evacuation waves.
People per wave
Number of people to evacuate in each phased wave.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Population to evacuate = 5000, Outbound road lanes = 2, Distance to safety (mi) = 30, Avg vehicle occupancy = 2.5 = 6 input(s) provided
  2. Calculate Total evacuation time
    Total evacuation time = clearanceTimeHours + travelTimeHours
    1.57 = 1.57
  3. Calculate Vehicles needed
    Vehicles needed = ceil(population / avgOccupancy)
    2000 = 2000
  4. Calculate Road capacity
    Road capacity = lanes * vphPerLane
    2800 = 2800

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Vending

Vending Route Planner Calculator

Optimize vending machine routes by calculating service time, fuel, labor, and per-machine servicing costs.

Emergency Management

Emergency Kit Calculator

Calculate 72-hour emergency kit supplies for your household — water, food, batteries, first aid, and more.

Emergency Management

Shelter Capacity Calculator

Calculate emergency shelter capacity from floor area, per-person space standards, and resource needs.

Emergency Management

Disaster Recovery Cost Calculator

Estimate total disaster recovery costs including structural repair, contents replacement, debris removal, and temporary housing.

More in Safety, Compliance & Emergency.