Changes

Take the Sinbundang Line (dark red) to Yangjae Citizen's Forest (D09) station and go for exit 5. Follow Maeheon St (매헌로) across a park, dive beneath the highway you're after, and continue until you see a very wide avenue (there's a very visible E-mart mall nearby, might be good for stocking up on supplies before a long journey). You have to cross this wide avenue, there is a pedestrian crossing if you go up a bit on the right. After crossing the road turn left (cross another pedestrian crossing) and then right, following a road that takes you to the expressway in the direction of Busan. You'll pass close to an helipad and the rest area should already be visible by that time just after it. GPS Coordinates of the rest area is [37.4601N, 127.0419E]. There's also a place to pitch a tent (for those who came late in the evening, plan to set out next morning, and don't mind the traffic noise). The rest area itself has toilets for the disabled (with running warm water!), free hot water, free wifi, and all sorts of amenities. (This paragraph has been updated the 21/11/2017)