These questions test road classification, lane configuration, section-specific control and adverse-weather adjustment. Use that order every time, because a familiar motorway figure can be wrong for the road actually described.
Build the applicable ceiling
First identify whether the route is a general road, an automobile-only road or an expressway. Within a general road, note whether it is in a residential, commercial or industrial urban zone and whether it has at least two lanes in each direction. Within an expressway, one lane each way and at least two lanes each way are separate configurations. Then read any lawful section-specific or variable speed control. Only after those steps should weather change the result. The figures below reflect Article 19 as checked in the current Enforcement Rule effective 1 August 2026.
| Road setting | General national range or ceiling |
|---|---|
| Urban general road in the listed zones | 50 km/h, with a designated section able to permit up to 60 km/h. |
| Other general road | 60 km/h, or 80 km/h with at least two lanes in each direction. |
| Automobile-only road | 30 km/h minimum and 90 km/h maximum. |
| Expressway with one lane in each direction | 50 km/h minimum and 80 km/h maximum. |
| Ordinary expressway with at least two lanes each way | 50 km/h minimum and 100 km/h car maximum. |
| Qualifying specifically designated expressway section | The car maximum may be set up to 120 km/h; the 50 km/h minimum remains. |
Weather modifies the applicable maximum rather than selecting a new road class. A road made wet by rain, or snow accumulation below 20 millimetres, calls for a 20 percent reduction. The stronger 50 percent reduction applies when heavy rain, heavy snow or fog limits visibility to 100 metres or less, when the surface is icy, or when snow reaches at least 20 millimetres. A variable speed sign can prescribe another maximum, so do not apply the percentage in isolation when the scenario says such a sign controls. Keep minimums and maximums separate as well: the floor from one road class is not a ceiling for another.
The traps
- Transferring the 90 km/h automobile-only-road ceiling to a one-lane-each-way expressway. Those are different road classes, and the expressway ceiling in that layout is 80 km/h.
- Using the ordinary multilane-expressway ceiling for an expressway with only one lane in each direction. Lane configuration changes the applicable maximum.
- Assuming a specially designated higher expressway figure applies to every expressway. The designation must belong to the section being used.
- Putting an ordinarily rain-wet road in the 50 percent reduction group. Wetness activates the 20 percent reduction unless a variable speed sign prescribes another maximum.
Try it
On an urban general road in a residential zone with no designated higher section and no lower posted control, what is the national maximum? Enter the number in km/h.
On an automobile-only road under the national general rule, what is the minimum speed? Enter the number in km/h.