Mobile Radar trucks would be interesting if we had historical value to them, for example one of the things that hurt the japanese in the southwest pacific theater was the allies had radar on land, at the time radar was mainly only used on capitol ships because it was so big and heavy (something the Japanese did not even have on ships yet).
However, we have radar sites on Ships, Fields, Vbases, what more do we need? Its already a handycap to have them all over the place.