I am a consultant for an AVL (automatic vehicle location system)
system used by the Southeastern counties of Michigan. The system is
used on winter maintenance vehicles and works on 900 MHz. The
vehicles are often stored overnight in metal buildings where it is
difficult to obtain transceiver communication from the AVL system. Is
there a low cost (possibly passive) way to port 900 MHz radio
transmissions into these buildings?

Thanks,

Eric Anderson