Jun 182017
 

via Telematics News

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
  • Smart cities for whom? Leveraging technology for an inclusive and just Atlanta
    on December 10, 2017 at 11:40 am

    Common examples include traffic signals that monitor intersections for accidents, trash cans that alert sanitation workers when they’re full, or air quality monitors that send an alert when pollution levels are unsafe. Locally, the North Avenue Smart ... […]

  • South Orange Joins State Safety Campaign To Increase Pedestrian-Motor Vehicle Safety
    on December 9, 2017 at 4:00 am

    The Street Smart NJ campaign is a collaborative effort between public ... “We’ll also be reminding pedestrians to use crosswalks, cross at intersections, and not jaywalk.” Officers will also address speeding and distracted driving and walking ... […]

  • For Spokane, being a smart city starts with a better way to measure air quality
    on December 8, 2017 at 1:38 pm

    (Urbanova) As part of its smart city program, Spokane ... The IoT air sensors are expected to be attached to street lights around road intersections where particulate matter is highest. After collecting data, the university intends to compare the ... […]

  • Smart City Pioneers: Where Are They Now?
    on December 7, 2017 at 3:44 pm

    Smart Cities 2.0 is where most cities are now ... starting to use advanced sensors to predict potholes and identify intersections with frequent near-crashes. With this data, the city can direct resources to fix potholes before they happen and make changes ... […]

  • City Tests New Smart Technology Traffic Signals
    on December 6, 2017 at 9:12 am

    "The city is finally moving into the 21st century and embracing technology that can improve traffic," Mayor John Tory said at the recent installation of the first smart traffic signal at the intersection of Yonge Street and Yonge Boulevard. "Over the last ... […]

  • Theory and practice converge at 'Smart Cities' symposium
    on December 5, 2017 at 2:55 pm

    But smart cities are not just digitally sophisticated ... are how connected vehicles might make it possible to eliminate stop-and-go traffic through intersections - and whether that level of connectivity is scalable over many intersections, roundabouts ... […]

  • Driverless Shuttle Coming To Gainesville As Part Of The Smart City Initiative
    on December 5, 2017 at 12:00 am

    Arreola said Smart City projects, like the autonomous shuttle ... What does it mean to raise a child in a city where we can detect gunshots and monitor the most dangerous intersections? What does it mean to live in a city where we’re building up?&rdquo […]

  • Virginia Smart Road helps researchers improve automobile safety
    on December 4, 2017 at 9:00 am

    The expansion added buildings, a roundabout, stop-controlled intersections, reconfigurable automation-compatible pavement markings and roadside features to the Smart Road. All the added features are completely configurable in a short period of time. […]

  • Timothy Goodman on his 'People Love' mural for the 'Street Smart' Alumni Exhibition [Video]
    on November 29, 2017 at 1:20 pm

    Teeming with words and images, Goodman’s murals in particular convey the energy that drew him to New York as an SVA undergrad and kept him here, making him an ideal candidate for this season’s alumni exhibition,“Street Smart: The Intersection of Art ... […]

  • Discover the smart city market
    on November 28, 2017 at 9:48 pm

    Smart city are progressive, forward-looking and resources-efficient and providing high quality of life. Smart cities exist on the intersection of digital, urban environment and disruptive technology. Smart city uses information and communication technology ... […]

via Google News and Bing News

Other Interesting Posts

Leave a Reply

%d bloggers like this: