railway crossing sign and train tracks in namib desert. namibia, africa

advice africa alertness attention background billboard careful caution close concentration concept copy countryside crossing danger desert drive driveway driving effect exhilaration exploration game guidance hazard horizontal icon informationssign infrastructure landscape limit moving namib namibia namibian nature nobody passage photography place railroad rails reserve risk road roadsign rocks rural safari safety security shield signage signpost slow space speed stop street terrain texture tourism trail train triangle trip vacations warning watch wilderness