A crossroads for intersections
Sick of waiting at traffic lights? The semi-autonomous driving aids being fitted to many new cars could consign the red light to history, A*STAR researchers report. According to their modeling, a system in which each car crosses the intersection in its own virtual bubble of safe space, modulating its speed using adaptive cruise control, will result in smooth traffic flow in each direction.
In the city of the near future, traffic lights would be complemented by and then replaced with a communication beacon, explains Bo Yang from the A*STAR Institute of High Performance Computing, who led the work. The beacon gathers and transmits data about the distance and approach speed of vehicles nearing the intersection, which each car feeds into an algorithm that plots a safe course through without having to stop.
At the algorithm’s heart is the concept of “adaptive repulsive force”. The closer two cars’ trajectory would bring them at an intersection, the stronger their repulsion and the greater the speed adjustment they make to pass each other safely.
Yang set out to reduce barriers to adoption of this system. “One of our most interesting findings is that the rules governing the necessary repulsion between vehicles is rather simple,” he says. The result is a system that does not require much computing power at the beacon or in the vehicle itself.
Cars need not be fully self-driving, but rather simply able to brake and accelerate autonomously – which cars fitted with smart cruise control can already do. The driver gives up control of the car’s speed through the intersection but remains in charge of steering.
In Yang’s simulations, the algorithm worked effectively even for relatively complex intersections. “In most cases, pre-emptive deceleration only slightly lowered the vehicle velocity, resulting in safe passage of each vehicle across the intersection without coming to a full stop at any point,” Yang says.
The system’s other advantage is that it could be phased in gradually. Initially, traffic lights would still be needed to help older cars pass through the intersection. As smarter cars become prevalent, the lights can switch off for more and more of the time until they are no longer needed at all. “Our simple algorithm only requires basic vehicle intelligence, but is also fully compatible with more intelligent vehicles that may come in the future,” Yang adds.
Learn more: A crossroads for intersections
The Latest on: Smart intersections
- Building a Brand in India? #7 Things you Must Breathe as a Business on August 20, 2017 at 11:31 pm
and into store layout and design). High quality storytelling, laced with smart wit, works wonders and startup brands can (and should) grow word-of-mouth! 2. Finding your own answer to the Online-offline intersection It’s a no-brainer that generating more ... […]
- Report shows lineups as long as 500m at some intersections due to southeast Valley Line LRT on August 18, 2017 at 10:08 am
The report identifies the five worst intersections where drivers will experience delays ... “It’s not about continuing to add lanes of traffic; it’s around smart decisions about how you’re providing options for commuters in large cities.&rdquo […]
- Smart computers on August 18, 2017 at 1:00 am
The demand for such diverse intersections between man and machine is huge: At the University Hospital Freiburg, for instance, it could be used for early detection of epileptic seizures. It could also be used to improve communication possibilities for ... […]
- Cop Heading To Trial After Hitting Smart Car At 104 MPH on August 17, 2017 at 9:26 pm
Dashcam taken from his police cruiser shows him aggressively changing lanes and only turning his emergency lights on to drive through intersections. He then slams into the rear of a light-blue Smart car, causing it to roll several times and leaving the ... […]
- Lake Nona Partners with Intersection to Transform the Traditional Brick and Mortar Retail Experience on August 17, 2017 at 6:15 am
Intersection is backed by Google's parent company Alphabet, through its urban technology company, Sidewalk Labs, which works to accelerate and guide the creation of smart cities. Lake Nona is being developed by Tavistock Development Company, a diversified ... […]
- The most dangerous intersections in Seattle for bicyclists and pedestrians on August 17, 2017 at 6:00 am
A study released earlier this year by Smart Growth America, a national advocacy organization ... The area just south of the University Bridge, a busy intersection but not one of the city’s most trafficked, has more bike-car collisions than any other ... […]
- Deputy smashes into a Smart car at 104 mph, newly released dashcam video shows on August 17, 2017 at 3:23 am
only activated his emergency lights to go through intersections and exceeded 100 miles per hour as he crashed into another vehicle, according to reports obtained by the Palm Beach Post. That crash was into the rear of a Smart car driven by Harry Deshommes. […]
- Hylan Boulevard to get 'smart' left-turn signal at Midland Avenue on August 16, 2017 at 10:44 am
as a "smart" left-turn signal will be installed that will be triggered by a vehicle sensor in the road. Councilman Steven Matteo announced the upgrade to the Grant City intersection on Wednesday. The left-turn signal will be installed by mid-September ... […]
- 12-meter-long electric smart bus starts road test in central China on August 15, 2017 at 11:34 pm
Photo taken on Aug. 15, 2017 shows a 12-meter-long electric smart bus making a turn at the intersection during a road test in Zhuzhou, central China's Hunan Province. Photo taken on Aug. 15, 2017 shows a 12-meter-long electric smart bus running on the ... […]
- Shocking moment cop with SIX prior on-duty collisions plows into Smart Car at 104mph causing the driver a traumatic brain injury on August 15, 2017 at 12:49 pm
Witnesses told investigators the light-blue Smart car rolled over several times before it came ... 2008: Patrol car rear-ended vehicle that was clearing an intersection, causing $4,000 in damages; one-day suspension without pay and 60 days without a ... […]
via Google News and Bing News