ˈ ̷ ̷ˌ ̷ ̷ noun
: the end of a road: as
a. : one where men and goods must continue on foot or on animals
heroic bands of soldiers labor … to keep the trucks moving through to the roadhead , where mules or porters will take over the traffic — G.H.Johnston
b. : the farthest point reached by a road under construction