पथिकोत्पथिकास्तद्विद्युः ॥ कZ_०२.२१.१७ ॥
pathikotpathikās tad vidyuḥ
Travelers—both those on the road and those off the road—will know that (i.e., the evasion/route taken).
Evasion leaves social traces: ordinary travelers observe routes and can serve as information sources for customs enforcement.