If fog is forecast, consider delaying the trip until visibility improves. If you encounter it while travelling, respond to the conditions and official guidance, not a target arrival time or an app score. Keep every phone interaction and trip review for a safe stop after driving.
Make the first decision before departure
Ontario’s official driver’s handbook recommends avoiding travel in fog where possible and checking forecasts. That gives you a useful planning question before the engine starts: can this journey wait, or can the appointment be moved? Build the answer into your plan rather than expecting a navigation estimate to settle a visibility decision.
Check current weather information for the route, not only the place where you are standing. Confirm the destination contact and what you will do if you arrive later. A flexible arrival arrangement removes one reason to continue simply because someone is expecting you at a precise time.
Use lighting and space appropriate to the conditions
The Ontario handbook advises turning on the full lighting system, using low-beam headlights, slowing gradually and increasing following distance. It explains that high beams reflect off fog droplets and make seeing harder. These are Ontario handbook instructions; check the guidance and rules that apply where you drive.
Read the official guidance before travelling: Ontario MTO: driving at night and in bad weather
Do not turn this into a fixed speed or a universal following-distance number. Visibility and the road situation are not fully described by a weather label. Follow official instructions and respond to what you can safely see, while keeping your attention on driving.
Know when the plan needs to change
The same handbook advises moving completely off the road into a safe parking area if fog becomes too dense to continue, and warns against stopping on the travelled portion of the road. Review that advice before the trip. A sudden loss of visibility is not a suitable time to read a long article on a phone.
After reaching a safe stopping place, reassess the journey using current information. Let the destination know about a delay when it is safe and lawful to use the phone. Continuing later, changing the arrangement or ending the journey are planning decisions; finishing a route is not an achievement that should override the conditions.
Record observations after the drive, not during it
A useful personal review can be short. In your own notes, record the approximate route segment, the conditions you noticed, whether you changed the plan and one preparation that would help next time. Do not add precise visibility measurements or weather labels that you did not observe or verify.
For example: visibility reduced on the rural segment; arrival moved later; next time check the forecast before committing to that departure. This is an illustrative note, not a reported Roadsy user experience or a reconstruction of a real journey. You can keep it in your own record alongside any available trip history.
Read how to make a useful review from your personal driving history
Do not use a score to certify a foggy drive
A driving journal can help you revisit a route and the information it recorded, but a score is not a direct measurement of what you could see through the windscreen. A smooth speed trace does not establish that the chosen speed suited the visibility, and a missing event does not prove that nothing concerning happened.
Keep your observations separate from measured data. If the route looks incomplete or uncertain, preserve that uncertainty instead of filling the gap with a confident story. Avoid comparing a foggy journey with a clear-weather drive as though the surrounding conditions were identical.
For the limits of trip interpretation, read how driving scores and data confidence work
Turn the review into one preparation step
Choose one concrete action you can take before a future journey: leave a more flexible departure window, identify a suitable planned stop, review the vehicle’s lighting controls while parked, or agree on a delay contact. The value of the review is a better next decision, not a claim that the previous drive was certified safe.
Official guidance was checked September 29, 2026. Weather warnings and road conditions require a fresh check for each trip. This article is general preparation and reflection guidance, not live navigation or an emergency response system. Roadsy availability and supported features should be checked on the current product pages.