"traffic_signals"=>"signal","traffic_signals:direction"=>"forward"
"traffic_signals"=>"signal","traffic_signals:direction"=>"backward"
"button_operated"=>"yes","traffic_signals:direction"=>"forward"
"button_operated"=>"yes","traffic_signals:direction"=>"backward"
"button_operated"=>"yes","traffic_signals:direction"=>"backward"