User:Mhh60/USA/Best map editing practice
Because drive-through lots can be narrow and congested, with one-way sections, the best way to represent them is often a one-way drive-through loop. Caveat: because both ends of a segment cannot connect to the same junction, if the lot has only one entrance/exit, it is necessary to build the loop using three segments.
Parking Lot Roads that are usable only by drive-thru customers should normally not be mapped, to avoid routing non-drive-thru customers on them. If it is desirable to map them (to avoid drive-thru customers being snapped onto nearby parallel roads), they should be mapped as Private Roads to avoid thru-routing.