society > travel > means of travel > route or way > way, passage, or means of access to a place > [noun] > congested or difficult part (3)
A steep or difficult part of a road. Also: a steep hill. Now chiefly Australian and New Zealand.
A place where a road, watercourse, etc., narrows, esp. one on a road where the flow of traffic is impeded. Hence: a part of a route where congestion…
(a) Mathematics a point at which a surface touches itself tangentially; (b) a point of congestion, confusion, or difficulty; esp. a place on a…