Interference from Vehicular Radar and CARMA Site Selection Geoffrey C. Bower Radio Astronomy laboratory, University of California, Berkeley, CA, 94720 Vehicular radar may produce substantial radio frequency interference for millimeter observatories. The FCC has recently approved the use of the 24 GHz band for this purpose. The radars present a danger in both the fundamental and harmonic frequencies. FCC emission limits correspond to an 0.6 MJy source at a distance of 1 km. Careful site selection can significantly mitigate these effects.