沿路 is read as えんろ (enro) and means route.
えんろ
enro
ろせんにそって
along the route (line)
えんがん
coast
えんせん
places alongside a railway line, bus route, major thoroughfare, etc.
ぞい
along
そう
to follow (a policy, plan, etc.)
えんかく
history
えんどう
roadside
そって
えんかいしゅう
(Russian) maritime provinces
えんかい
えんがんぶ
coastal region
えんがんけいびたい
coast guard