Disaster prevention equipment of the excavation structure department
How to evacuate the excavation structure part and Keiyo JCT ramp part
Facility 1 Evacuation stairs
We have an evacuation stairs as a means of evacuation in the event of a disaster. The evacuation stairs are arranged at intervals of about 1 km for the cut structure and about 400 m for the tunnel. There is an emergency exit as shown in the photo on the right. Please enter from there and evacuate.
emergency exit
Evacuation stairs
Facility 2 Warning light lighting
If there is a danger in the direction of travel due to fire, etc., a red warning light will flash at the entrance to the excavation structure from the tunnel entrance and the section of the bridge to inform you of the danger.
Facility 3 Pacemaker Light
In areas where the slope is steep, a rear-end collision may occur due to a sudden change in speed. In such places, if the driving speed slows down, the light turns blue at a constant speed to assist speed recovery. It lights up orange in normal condition and flashes red in case of emergency.
Facility 4 loudspeaker
In order to transmit information to the driver, speakers are installed on the main line and the lamp section.
Facility 5 monitoring device
Cameras are installed at intervals of about 90 m, and traffic flow abnormalities are quickly detected by image processing software.
Facility 6 Emergency telephone
They are installed at intervals of about 200m. In an emergency, pick up the handset and you will be connected to the Road Control Center. Please tell us the situation.
Facility 7 fire extinguisher and fire hydrant
Fire extinguishers are installed at intervals of about 50m. Fire hydrants are installed at intervals of about 50 m only in tunnels of 500 m or more.
When the tunnel is in a dangerous state due to fire, etc., we take measures to prevent entry. Warning lights and information boards will inform you that there is a fire ahead.
Approach control method (tunnel entrance)
We have installed a tunnel entrance indicator light in front of the tunnel and a warning light on the tunnel wall. In case of an emergency, you will be notified that a fire has occurred in the future by blinking the red warning light.
Warning light lighting installation position diagram
On the outer ring road, warning lights are installed at the tunnel entrance and the entrance to the excavation structure from the bridge section.
