sg is small, thus she can afford to lit highways and expressways with overhead lamps. big countries with long stretches of roadways and freeways will have to rely on tiny reflectors on the road to provide lane guidance to motorists. in fact, using the reflected light of headlights is a better and safer way for drivers on long stretches in rural country. there's no glare from overhead lamps, and colors (white for lanes, yellow for boundaries) are more distinct. it's actually visually sharper for freeway driving in the middle of nowhere at night. only sinkie drivers are accustomed to overhead glare and bright lights flooding their expressways. and they are not accustomed to very long drives where sleep deprivation and lack of patience and attentiveness can be a problem.