arrow blue bright direction indication one way only direction pointing pointing back sign traffic traffic flow traffic sign white advice announcement arrows aware awareness brown bush communicating communication directing indicating indicators information informative informing metal pedestrians pointing-the-way security signs stroll strolling visitors walkers walking walking-paths walking-tracks wood wooden directional divergent diverging law no-alternative only pointer specific splitting splitting-up street-sign traffic-flow traffic-sign turn turning two-way blank board empty follow nothing