Interference on 147.075 output

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For a few weeks now, I have been hearing some interference on the output of the 075 machine. I live on the SE corner of BWI and have heard this interference at my home QTH as well as in the areas of Rt 10 and ordinance RD, I97 and I-695 interchange and as far south as I-97 and Quarterfield Rd.

After listening for a while now, I grabbed enough of one transmission to believe it is a cab dispatch service. One snippet stated "In front of the hospital doors."

Since I have been out of the scanning thing for a while now, I was wondering if anyone knows how cab company communications work and any frequencies I can listen to to confirm what is going on.

Thanks,

Will
KA3UQQ

Apparently after the board sent a letter to the offending transmitter control operator, the problem was fixed. Thank you to all for your reports on this interference.