As a full time courier on the Island, I know most of the roads around here and this is one of the most reliable locations for the "Tax-Man" to be located. That being on the down-side in each direction of the East/West bridge. Meaning if you’re coming over the crown, (top) of the bridge,(over Broad Creek), make good & sure you’re doing 40 mph. They park on the far right of the highway bridge usually in unmarked cars. Frequency is, (again) unknown, but more so during quota time, (i.e. the last of the month)