The Netflix K-Drama "Extraordinary Attorney Woo" episode 7 ("A Tale About Sodeok-Dong") is about a town protesting a planned highway going through it. Some aerial planning maps are shown (it would be interesting to find out which area they picked for this) and the red corridor is pretty much a straight line, dividing the town. It's about an hour drive from Seoul.
There's some discussion in court and otherwise about alternatives (tunnel, bypass), land use, their version of environmental impact statements, compensation for ROW takings, and even a 3-d video drive-thru of why the defendants believe the alternatives are not viable. The highway ("Hongduk-ro" or similar, no number) is depicted as a 2-lane road, though the impact described would be for a wider road.
Construction has already started (red flags to mark ROW; a 4-wheel excavator digging up a road) so time may be running out.