Traffic Technology TodayTraffic Technology Today
  • News
    • A-D
      • Appointments & Staffing
      • Asset Management
      • Autonomous Vehicles & ADAS
      • Awards
      • Cloud Computing
      • Congestion Reduction
      • Connected Vehicles
      • Covid-19
      • Cybersecurity
      • Data & Modeling
      • Deals, Acquisitions & Mergers
    • E-J
      • Electric vehicles & infrastructure
      • Emissions & Low Emission Zones
      • Enforcement
      • Event News
      • Funding
      • Incident Detection
      • Infrastructure
      • Intersections & Traffic Signals
      • ITS
    • K-S
      • Legal / Government Regulation
      • Machine Vision / ALPR
      • Mapping
      • Mobility as a Service
      • Multimodality & Micromobility
      • Planning, Testing, R&D
      • Public transit
      • Safety
      • Smart Cities
      • Smart Parking
    • T-Z
      • Tolling
      • Traffic counting & categorization
      • Traffic Management
      • Traveler Information Systems
      • Tunnels & Bridges
      • Variable Message Signs
      • Vulnerable Road Users
      • Weather systems
  • Features
    • Features
    • Opinion
  • Online Magazines
    • May 2025
    • March 2025
    • December 2024
    • September 2024
    • June 2024
    • Archive Issues
    • Subscribe Free!
    • > Tolltrans
  • Video & Audio
    • Video
    • Audio
  • Podcast
  • Events
  • Webinars
  • Technology Profiles
LinkedIn YouTube X (Twitter)
LinkedIn YouTube X (Twitter)
Subscribe >
Traffic Technology TodayTraffic Technology Today
  • News
      • Appointments & Staffing
      • Asset Management
      • Autonomous Vehicles & ADAS
      • Awards
      • Cloud Computing
      • Congestion Reduction
      • Connected Vehicles
      • Covid-19
      • Cybersecurity
      • Data & Modeling
      • Deals, Acquisitions & Mergers
      • Electric vehicles & infrastructure
      • Emissions & Low Emission Zones
      • Enforcement
      • Event News
      • Funding
      • Incident Detection
      • Infrastructure
      • Intersections & Traffic Signals
      • ITS
      • Legal / Government Regulation
      • Machine Vision / ALPR
      • Mapping
      • Mobility as a Service
      • Multimodality & Micromobility
      • Planning, Testing, R&D
      • Public transit
      • Safety
      • Smart Cities
      • Smart Parking
      • Tolling
      • Traffic counting & categorization
      • Traffic Management
      • Traveler Information Systems
      • Tunnels & Bridges
      • Variable Message Signs
      • Vulnerable Road Users
      • Weather systems
  • Features
    • Features
    • Opinion
  • Online Magazines
    1. May 2025
    2. March 2025
    3. December 2024
    4. September 2024
    5. June 2024
    6. March 2024
    7. Archive Issues
    8. Subscribe Free!
    9. > Tolltrans
    Featured
    New issue graphic
    May 7, 2025

    Read the new TTi digital magazine online now – May 2025

    ITS By Tom Stone
    Recent
    New issue graphic

    Read the new TTi digital magazine online now – May 2025

    May 7, 2025

    NEW TTi MAGAZINE! Read the March 2025 digital edition online now

    March 21, 2025

    Digital magazine – read the new issue of TTi online for free – December 2024

    December 12, 2024
  • Video & Audio
    • Video
    • Audio
  • Podcast
  • Events
  • Webinars
  • Technology Profiles
LinkedIn YouTube X (Twitter)
Traffic Technology TodayTraffic Technology Today
Data & Modeling

Hong Kong team develops GPS-augmentation system to cope with multi-level road networks

Tom StoneBy Tom StoneMay 10, 20183 Mins Read
Share LinkedIn Twitter Facebook Email

A team of researchers at the University of Hong Kong (HKU) has won international recognition for developing a navigation system that provides accurate positioning information on complex multi-level road networks.

Multi-level road networks such as flyovers and overpasses are built in large cities to solve traffic congestion, but instant and correct identification of the road level that a vehicle is driving on is crucial to make driving easier and safer.

Drivers relying on standard GPS navigation that accidentally drive onto a flyover with intention of traveling only at ground level often face this problem. The GPS navigation system does not realize that the vehicle has entered a wrong level and continues to give instructions as if it were on the ground, and will only begin to redirect to a new route once the error becomes apparent. These positioning problems often create confusion and ‘motorway anxiety disorder’ for drivers, making them more prone to accidents.

A research team led by Professor Anthony Yeh Gar-On at HKU’s Department of Urban Planning and Design has developed a novel solution to this longstanding GPS navigation problem by instantly identifying whether a vehicle has entered a flyover or is still at ground level.

The ‘Angle Difference Method’ developed by the team compares the inclination angle of a vehicle and angles of different road levels stored in a Transport GIS (Geographic Information System) to determine whether a vehicle has entered the ramp of a flyover or is still at ground level.

The system uses an ordinary smartphone that can be put anywhere in the vehicle, at any angle, with a plugged in or installed onboard diagnostic (OBD) device. The system provides a simple and inexpensive solution to warn drivers instantly when they have accidentally entered a wrong road level. Tests show the system has a level-identification accuracy of 100%.

The innovation won a gold medal award at the Geneva International Exhibition of Inventions in April, and has also received a US patent and an International PCT patent. The team is currently discussing with global GIS and vehicle navigation operators on potential applications and commercialization of the new system.

“The invention provides an innovative, simple and inexpensive method to overcome the long existing vehicle navigation problem that many people have tried to solve since GPS was used over 20 years ago by determining instantly whether a vehicle has entered a flyover or is still on the ground level,” noted Professor Yeh.

“The research team will further apply this Angle Difference Method to the navigation of automatic cars.”

Share. Twitter LinkedIn Facebook Email
Previous ArticleINSIGHT: SOCRATES project releases framework for European interactive traffic management system
Next Article Gridsmart creates cybersecurity division to protect transportation infrastructure
Tom Stone

Tom has edited Traffic Technology International (TTi) magazine and its Traffic Technology Today website since May 2014. During his time at the title, he has interviewed some of the top transportation chiefs at public agencies around the world as well as CEOs of leading multinationals and ground-breaking start-ups. Tom's earlier career saw him working on some the UK's leading consumer magazine titles. He has a law degree from the London School of Economics (LSE).

Related Posts

Downtown from Corona Heights, California.
Traffic Management

Corona, California, awards Iteris $4m smart mobility contract

May 1, 20252 Mins Read
Tolling

Q-Free deploys its first Kinetic Mobility ATMS in the US on three toll roads

April 30, 20253 Mins Read
Incident Detection

TECH PROFILE: Reliable vehicle detection in any conditions

April 17, 20254 Mins Read
Latest Posts
Fibes Exhibition Centre, Seville

EXCLUSIVE: ITS European Congress Guide

May 9, 2025
New issue graphic

Read the new TTi digital magazine online now – May 2025

May 7, 2025

Adept Live Labs 2 launches pledge to drive decarbonisation across UK highways

May 7, 2025
FREE WEEKLY NEWS EMAIL!

Get the ‘best of the week’ from TrafficTechnologyToday.com direct to your inbox every Thursday


Supplier Spotlights
Our Social Channels
  • Twitter
  • YouTube
  • LinkedIn
Getting in Touch
  • Free Email Newsletters
  • Contact Us
  • Meet the Editors
  • Supplier Spotlight

Upcoming Events

May 19
May 19 - May 21

ITS European Congress – Seville 2025

May 21
May 21 - May 22

Traffex

Jun 17
June 17 - June 19

Intertraffic Americas – Mexico City 2025

View Calendar
© 2023 Mark Allen Group Ltd | All Rights Reserved
  • Cookie Policy
  • Privacy Policy
  • Terms & Conditions

Type above and press Enter to search. Press Esc to cancel.