Said valley is GPS-jammed

دره مورد نظر دچار اختلال GPS شده است

یعنی توی اون دره خاص، دستگاه‌های GPS کار نمی‌کنن یا درست نشون نمی‌دن.

a main road for travelling long distances, especially one connecting and going through cities and towns

The soft glowing light from the sky when the sun is below the horizon.

I understand what you mean or I will help you.

an area or a region with a particular feature or use

You are correct about something.

the condition of the atmosphere at a particular place and time, such as the temperature, and if there is wind, rain, sun, etc.