How do I simulate a car crash?

Open this page and use the live Building Evacuation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a car crash from your own measurements.

Use case · powered by Building Evacuation

Building Evacuation for a car crash

Simulate a car crash live in your browser. This runs the real Building Evacuation solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Building Evacuation / EgressLive

crowd flow through exits

Controls

Presets

Occupants

Exits

Walk speed

Speed1×

Occupants head for the nearest exit while pushing apart in crowds, so bottlenecks and congestion form at doorways — the effect that drives real egress times. Add or remove exits to see how total clearance time responds. Planning aid only.

▶ Run in Python

Data Inspector

Evacuated0 / 150

Clear time0.0 s

Exits2

Social-force velocity

v = 1.3 \overset{e}{^}_{exit} + 2.2 j \sum f_{ij}, \frac{N}{exits} = \frac{150}{2} = 75

Reading this result: Around 75 per exit — congestion starts to build at the doors, and adding an exit usually helps more than speeding people up.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

About this simulation

The full Building Evacuation tool models a car crash with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Building Evacuation

Building Evacuation for a house fire Building Evacuation for a wildfire Building Evacuation for a hazmat spill Building Evacuation for a mass-casualty scene Building Evacuation for a flood rescue Building Evacuation for a building collapse Building Evacuation for a chemical leak Building Evacuation for a search-and-rescue grid

Other ways to simulate a car crash

Wildfire Spread for a car crash Hazmat Plume for a car crash START Triage for a car crash Fire Hose Hydraulics for a car crash Skid-to-Stop Speed for a car crash Radio Range for a car crash

Frequently asked questions

How do I simulate a car crash?: Open this page and use the live Building Evacuation tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a car crash from your own measurements.