"traffic_signals:sound"=>"yes","traffic_signals:direction"=>"forward"
"traffic_signals:sound"=>"yes","traffic_signals:direction"=>"backward"
"traffic_signals:sound"=>"yes","traffic_signals:direction"=>"forward"
"traffic_signals:sound"=>"yes","traffic_signals:direction"=>"backward"
"traffic_signals"=>"pedestrian_crossing","traffic_signals:direction"=>"forward"
"traffic_signals"=>"pedestrian_crossing","traffic_signals:direction"=>"backward"