Dynamic%20Traffic%20Control

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Dynamic Traffic Control

• Yishai Goldstein Nahum Nir
• Computer Science Engineering
• Hebrew University

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Present Traffic Situation
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The Goals

• To minimize annoyances in the driving experience
• To help the driver reach his or her destination
  quickly

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Methods for Achieving Goal

• Improve traffic lights
• Improve signs

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Dynamic Traffic Lights
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General Algorithm
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Aggravation

• When a car does not drive smoothly it will
  accumulate aggravation
• This aggravation can be represented as some
  number
• Each car starts off with some aggravation

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Traffic Light Algorithm

• The more aggravation there is at a stop light
  the more likely the stop light is to turn green
• No one waits forever
• Emergency vehicles may be provided with a switch
  for infinite aggravation

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Ant Colony

• Many non-intelligent individuals
• Intelligent System
• Pheromones - Aggravation

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Inside The Algorithm

• Junctions, Cars and Ants
• Decision Making
• Junctions
• Ants

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Simulation

• Scale, jams, and JAVA jams

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Simulation

• Proof of the system

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Dynamic Directional Signs
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Signs Today

• Example
• Problem
• Different routes maybe preferable, depending on
  the present traffic

• Solution
• Have signs change dynamically according to
  present traffic, just as our traffic lights.

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Traffic Sign Algorithm

• Same infrastructure (Hardware)
• Internet routing
• Dijksras algorithm for shortest path
• Path measured by cars

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Product Presentation

• Seeing the traffic signs in action

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Map
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User Interface Overview

• The user - driver, will be exposed to traffic
  lights and directional signs, just as a driver is
  today
• Drivers will not need to learn a new system
• They will not even need to be aware that the
  system had been changed

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Problems Solutions
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Is Big Brother Watching?

• No information of specific vehicle is used
  (unlike cell-phones)
• Extra information can be added if needed

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Four wheels good, two legs bad

• What about pedestrians?
• When cars have a red light people have a green
  light
• Push buttons can be added at crosswalks
• Not all cars must participate for system to work

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Competitors

• Present system in Jerusalem
• Camera based
• Requires human staff at all times
• Predefined scenarios only
• Pelephone
• General directions not specific
• No handling of lights

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Future Improvements

• Driver can request a specific route
• Special screen inside car
• Connection to PDAs
• Traffic report
• Statistics accumulator

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Thank You
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Technical Overview
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Hardware

• Intersection Computer
• Sensors
• Traffic Lights
• Traffic Signs
• Network
• Car Transmitter

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Transmitters

• One in each car
• Aggravation builds in one byte of temporary
  memory
• Connected to speedometer
• Internal clock
• No need for permanent memory