brake car city drive road sign slowdown stop traffic urban build cone repair threat transportation under construction warring advice alert appropriate-behavior appropriate-behaviour black care cars caution communicate communication denied information informing law legal no-standing not-allowed not-permitted park permission-denied prohibited prohibition red refusal restricted restriction restrictions risk risks risky road-safety road-side safety signs sky unacceptable vehicles verge warning warning-sign white danger deer hazard ice rural snow triangle boy cow crossing road Hanoi looking taking care Vietnam crossing crossover crosswalk pedestrian public street zebra child mother path pedestrians roadsign walk bark find guide kampinos lost map mark national nature paint seek trail tree arrows blank direction guidepost marker signboard change diversion left line lines right roadsigns turn turning