It's quite useful to me when biking (I prefer to avoid gravel on my road bike, OSMAnd and brouter will show you the type and allow a few tweaks), and when on ro

It's quite useful to me when biking (I prefer to avoid gravel on my road bike, OSMAnd and brouter will show you the type and allow a few tweaks), and when on rollers (smooth asphalt is really needed, there is also a smoothness tag in OSM). https://wiki.openstreetmap.org/wiki/Key:smoothness https://wiki.openstreetmap.org/wiki/Key:smoothness Also useful if your vehicle is capable of light offroad but not heavy offroad. After having a few fright down a dirt road in a relatively light duty off-road vehicle, I went back and made it "very horrible" in OSM.