Tunnels

same as coming out of a wooded area or into an open area.

Cross winds on a high profile vehicle like a dry van or reefer can push you off track. You can get a sense of this too in a mini-van or other larger profiled vehicle you might have driven. I know a couple of times in really bad storms, I can feel it in my car.

Bad enough, into the other lane or into the ditch.

 

Being from the Windy city, or any city, the winds can be stronger. The force is increased when the wind is channeled in between the smaller gaps in the building.

The same way a nozzle increases the force on a hose.

When you exit a tunnel, if the wind is perpendicular to the road it will be a sudden side impact that you must be prepared for.

If the wind is coming at the side of the mountain, say at a 45 degree angle, towards the mountain and the road at the same time, the wind speed can be increased in the same way as in the city.

Mikeeee

 

I believe it's defined as Wind Shear.

 

I have only heard that term in areas where no physical objects existed. Like on runways etc...

I will have to look it up...

Mikeeee