As a type of road, the "Narrow street" is very restrictive and cannot be applied to a winding country road, without visibility and not allowing 2 vehicles to pass along its entire length.
In France, for example, the case of dangerous roads is frequent and not indicated by specific speed limits. They require a reduced speed per sector, which can be found in mid-mountain, steep slope, dangerous bends without visibility or narrowing of the lanes making it difficult to pass another vehicle.
Even if the driver must adapt his speed to the traffic conditions, the signaling of such dangerous roads would be perfectly desirable.
On "Michelin maps", dangerous roads are indicated by red dotted lines on the segment.

I really agree with adding dangerous or unsafe road types so that users can look for safer alternative roads

I do agreed to have the permanent hazard for "Bumpy Road"

I agree the hazard of dangerous and unsafe road.

We need a Bumpy Road Hazards.
Actuall I add to the street name (Bumpy) to warn the driver to slow down, once I used the speed bump hazard, but it is not the correct type.
Since there is no speed bumb but the road is uneven and cause the car to jump

I am in support of this suggestion. Roads in South Africa are in a terrible state and warning people of bad sections would help tremendously.

Who makes the decision to designate a road "dangerous or unsafe." That's a very subjective decision that will generate comments both for and against by Wazers. Perhaps it will be a bit more objective if multiple editors can actually drive the road and reach a consensus, but in many cases that will not be possible.

Rank the different road segments according to safety standards and accidents reports. For example, a road with a hard, stone separator between lanes and wide margins would score higher on safety than bi-direction road of two lanes only, with no separation between the lanes and thinner to no margins. Given a route, a safety score will be given to the driver so he may pick his road by safety rather than time.

Excellent idea! Though I'm a good driver, I have found myself occasionally in situations in which I probably would have not taken a certain road, had I known in advance it is that dangerous. This happened to me both with a very steep road and with a curving road with on one side a valley.

Alternately, perhaps segments could be marked as "difficult" the way turns can be marked now. Then, the user's decision on whether to be offered difficult routes could apply to difficult segments as well as turns.