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Bus Cancellation Predictor
Will school buses be cancelled tomorrow?
Buses come off the road long before a school closes. Enter your city or postal code and this bus cancellation predictor scores the things transportation consortia actually watch — blowing snow, gusts across open roads, ice and extreme cold.
Your Bus Cancellation Chance
Buses and Schools Are Two Different Decisions
This catches out a lot of families every winter. You check whether school is closed, see that it is open, and put your child at the end of the driveway — and no bus ever comes.
The two calls are made by two separate organisations. Your student transportation consortium decides whether drivers can safely run the routes. Your school board decides whether the building opens. Across most of Ontario the buses are pulled first and the schools stay open, because a school that closes has to make the day up later while a cancelled bus route costs the calendar nothing.
So the practical answer on a marginal winter morning is usually: no bus, but school is running. If your child can get there another way, they are expected to. That is exactly the gap this page exists to fill — the snow day calculator answers whether the school closes, and this one answers whether the bus shows up.
How the Bus Prediction Works
The calculator fetches the live forecast for your coordinates and scores five factors from 0 to 100, then combines them by weight. The weights are deliberately different from the school-closure model.
| Factor | Weight | Why it matters |
|---|---|---|
| Snowfall total | 32% | Still the biggest single input, but the curve rises much earlier than for closures. Two inches that a school would ignore is already enough to threaten a rural run. |
| Wind gusts | 30% | The factor that separates this from a snow day calculator. Blowing snow across an open field is the most common reason buses are pulled, and it happens on days with very little new snow. |
| Temperature | 20% | Keeps snow packed on untreated gravel, and at roughly −35°C cancels buses outright because of unsheltered stops. |
| Route type | 13% | Rural concession roads drift over while city arterials stay clear. Same storm, opposite outcome. |
| Day of week | 5% | A small real effect at the start and end of the week. |
The Adjustments That Follow
The weighted score is then multiplied by several modifiers, and the result lists exactly which ones fired:
- Blowing snow. An inch of loose snow with gusts over 25 mph adds 22%. This threshold is deliberately lower than the closure model's, because a whiteout on one open stretch is enough to pull an entire zone.
- Freezing rain. Precipitation near freezing adds 35%, more than it does for school closures. A loaded bus cannot climb an iced grade, and gravel roads cannot be salted the way paved ones are.
- Extreme cold. Around −30°C the odds are floored at 55%; around −35°C they are floored at 82%, with no snow required at all.
- Storm timing. Snow peaking overnight adds 15%, because the decision is made off a pre-dawn road patrol. Snow that arrives mid-morning subtracts 20% — the run is already done.
- Regional resilience. An area that rarely sees snow pulls buses far sooner than a northern board that runs through it every week.
The final number is capped at 95%. A person driving the roads at 5am makes the actual call, and nothing about that deserves to be called certain.
Check Your Zone, Not Just Your Board
Transportation consortia split their territory into zones and cancel them independently. It is completely normal for the rural north of a board to lose its buses while the urban south runs a perfectly ordinary morning.
This matters for how you read the number above. If you selected a rural route and got a high probability, that applies to rural routes in your area — it does not mean every bus on the board is cancelled. Find your zone once, at the start of winter, and the morning announcement becomes much easier to interpret.
Where Announcements Are Posted
- Your consortium's website is the authoritative source, and it updates before anything else does.
- Local radio reads cancellations on air through the morning, usually from the same feed.
- The school board's own site normally mirrors the transportation notice, sometimes a few minutes later.
- If a decision has not appeared by about 6:30am, buses are almost always running.
Bus Cancellation Questions
Why are buses cancelled when school stays open?
They are two separate decisions made by two separate organisations. The transportation consortium decides whether drivers can safely run the routes; the school board decides whether the building opens. In most of Ontario the buses come off the road first and the schools stay open for students who can get there on their own.
What time are bus cancellations announced?
Most consortia patrol the roads before dawn and post a decision between 5:30am and 6:30am. Some announce the night before when a major storm is already certain, but a marginal overnight storm almost always produces an early-morning call instead.
Do buses get cancelled for cold weather?
Yes. Most Ontario consortia pull buses when wind chill reaches roughly −35°C to −40°C, with no snow required at all. Children waiting at unsheltered rural stops are the reason, along with the risk of a bus breaking down in dangerous cold.
Why do rural buses get cancelled more than city buses?
Rural routes run long stretches of concession and gravel road with open fields on both sides and nothing to break the wind. A few centimetres of loose snow plus a 40 km/h gust produces drifts and whiteouts there while the plowed arterial roads in town stay perfectly passable.
Can only some bus zones be cancelled?
Yes, and it is common. Consortia divide their territory into zones and frequently cancel the rural north while the urban south runs normally. Always check which zone your route falls in rather than assuming a single decision covers the whole board.
Is freezing rain worse than snow for bus cancellations?
Considerably worse. A thin glaze of ice defeats a loaded bus on any grade, and gravel roads cannot be salted the way paved ones are. A tenth of an inch of freezing rain cancels more routes than six inches of dry snow.
If buses are cancelled, do they run in the afternoon?
Usually not. Most consortia cancel for the full day once they cancel the morning run, because the drivers and the routes are the same either way. If you drive your child in on a cancelled-bus morning, plan to collect them as well.
Is this bus cancellation predictor free?
Yes. There is no sign-up, no account and no charge. The forecast is fetched in your browser and nothing you enter is stored on a server.
One Important Caveat
This is an estimate for planning, not an official notice. Only your transportation consortium can cancel buses. Always check their website or your local radio before assuming anything — and never make a travel decision based on this page instead of an official weather warning.