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CAT visits the area to find the cause of the accident, bends 100 bodies in front of the Criminal Court on Ratchadaphisek Road I found the radius of the arc connecting the short straight road. No warning signs With cars entering and exiting the alley Non-standard steel rail. Use speed beyond the Bangkok proposal.
On October 1, 2020, Mr. Pichai Thanirananon, Chairman of the Subcommittee on Prevention of Road Accidents and Deaths, Thailand Institute of Engineering Under Royal Board (CAT), together with Mr. Thananchai Cloud Prasertwanich Director of the Division of Policies and Planning Traffic and Transportation Bureau (Provincial Health Organization), Bangkok and various media fields Enter the inspection area around the bow of the Criminal Court Ratchadaphisek Road Or what the villagers call the arch of 100 corpses after frequent accidents
Pichai said that from the statistics in 9 months from January to September 2020, there were 293 crashes in the Criminal Court, 5 deaths, with cases from August 1 and September 4. 152 injured, only in September of 63 There were 41 accidents, 4 deaths, as follows: September 16, 2020, the black truck crashed, hitting an electric pole on the edge of a curved sidewalk, the Criminal Court in front of the ICO building, 1 death, daily on September 20, 2020. The van crashed into a power pole and a tree on the edge of the curved sidewalk at the Criminal Court in front of the International Trade Promotion Department building. A 2-year-old mother and child died every day on September 24, 2020. High voltage The steel barrier on the edge of the sidewalk is broken, damaged, the Criminal Court, during the period between Chandrakasem Rajabhat University and the OIC building, 1 death.
Pichai further said that from the inspection area, Ratchadaphisek Road, which is an 8-lane round-trip road, was found on the curve of the road next to the tunnel through the Ratchayothin Intersection, passing Soi Ratchada 36 (Sua Yai Uthit) to Soi Ratchada 32 with a very wide curve radius. The total length is almost 2 km. Most accidents occur at night. Or at times when visibility is poor, such as when it rains late at night, when the roads are clear, causing many drivers to exceed the legal speed limit. Originally at the Criminal Court curve Usually occurs on the exit side But after the tunnel through the Ratchayothin intersection Causing most of the accident area to shift to the entry side Due to cars going through the tunnel on the Ratchayothin intersection, they often have to speed up to the corner of the road. That it has no mechanism to reduce the speed of the vehicle. So if the speed of the car is higher than the forced speed, the driver will have a hard time controlling the car. Or unable to control the car to race down the road
Furthermore, the accident condition on the Ratchada curve was found to be caused by many factors. And the suggestions to solve the problem are as follows: 1. Characteristics of the Ratchada curve, Broken back curve, is a two-spoke curve connected by a short straight line. Naturally, the driver, when cornering, does not think that he needs to adjust the steering wheel. As a result, drivers need to be very careful to keep the car in a traffic lane, or if they drive at a speed higher than 80 km / h (or lower in rain), the vehicle often cannot keep the vehicle in Traffic line OR I can’t control the car at all Suggestions should fix the curve after it breaks. Be the same curve by a qualified design engineer Add bow navigation By installing a reflective traffic sign on the outside edge of the curve. And install speed control signs for safe driving Allow road users’ people to see clearly on road surfaces and hanging electronic speed signs.
2. No curved lift. (Cant) causes the car to enter a curve at a speed greater than the forced speed. Until the car cannot be controlled to run on the road Suggestions increase the lateral forces on the Sideway Force wheels by raising the outer curve higher. In order to control the wheels of the car to safely accelerate curves or other means such as pavement with small stones. To reduce the risk of losing your core and going out of the curve
3. Lack of mechanism to reduce the speed of the car (Traffic Calming), which makes the vehicle run from the tunnel through the curve towards the curve at a speed greater than the forced speed. Until the car can not be controlled to run on the road. Suggestions should look for measures and design braking equipment. To be safe This can be done in a number of ways, such as by using a barrier that blocks each lane of traffic. During dangerous turns Make a digital system indicates the speed of the passing car. Along with legal measures Speed guidance sign Switch to label to enforce specified speed, etc.
4. There is a Choi bifurcation from the inside out. Around the bend (Soi Ratchada 36 Sua Yai Uthit), which drivers cannot clearly notice. And this alley has a lot of vehicles coming and going, it is suggested to consider improving the traffic lanes and traffic signals before entering-exiting the alley. To help the car in the race to see the link more clearly in the curves OR position the leftmost lane to turn left at Soi Ratchada 36, Sua Yai Uthit
5. Steel rail in the center of the road and sidewalk. It can be seen that the steel rail has a shortening of approximately 30 cm from the edge of the road, which further decreases the effectiveness of the steel rail in preventing the danger of collisions. Besides, the steel rail is also close to the electric pole. The disabled car will hit the curb first and fly into the dangerous steel barricade Recommendations Consider building a rubber-covered concrete bumper against the sidewalk. Covered rubber material reduces impact. Or roller bumper rail Which has now been budgeted for the Bangkok road but for other points along the way
6. Traffic surface During this bend of the Criminal Court Found that the traffic surface is not smooth There is asphalt erosion. Broken stone The rain will have water holes. These have contributed to the bounce of the wheel. Controlling the car can be a risk Recommendations Adjust the traffic surface so that it is in good condition and smooth according to the norm.
7. Functions of urban roads The law requires drivers to have a speed limit of 80 km / h, unlike the design of the road that can withstand speeds of more than 90 km / h. In the long term, the focus should be on curriculum development and instilling an attitude of safety among citizens from infancy in school.
8. Push forward the concept of “Thailand towards zero deaths, a way to reduce road deaths and injuries to zero”. Address the problem of mortality and serious injuries on the road in a concrete way. The safe system approach recommended by the United Nations by the United Nations for all countries is to reduce deaths and injuries on the roads. To achieve the goal “Thailand towards zero deaths and serious injuries”
In this sense, the CAT and BMA will jointly promote the action plan to make it concrete and integrated. By the way, Bangkok accepts it in principle and will turn it into a quick win and a long-term plan. That takes time and offers a low budget. “Death on Thai roads” will be Thailand towards zero.
The reporter reported that during the delegation, visiting the area and giving interviews to the media, there were two personal car accidents at the end of a curve in front of the Criminal Court. Incoming side of Ratchadaphisek Road near the Bodhi tree With villagers bringing Thai costumes AND a zebra doll to ride too
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