Electronic road pricing (Hong Kong)

Electronic road pricing (ERP; Chinese: 電子道路收費系統) is an electronic toll collection scheme first proposed in Hong Kong in the 1980s to manage traffic through congestion pricing. While Hong Kong was a world pioneer in testing the technology, permanent implementation was historically stalled by public opposition and privacy concerns.[1]

History and pilot tests

Hong Kong conducted the world's first pilot test of an ERP system between 1983 and 1985. The system used electronic power tags attached to the undercarriages of 2,500 vehicles (which were detected by inductive loops buried in the roads).[1] Although the results were positive, reducing peak traffic by approximately 20%, the government failed to implement a permanent system due to intense public opposition regarding government surveillance and the perceived addition of a new tax during an economic downturn.[2]

Modern implementations

HKeToll and free-flow systems

In May 2023, the Transport Department began the rollout of HKeToll, a free-flow electronic tolling system using RFID tags and Automatic number-plate recognition (ANPR). This system replaced traditional toll booths at all government-owned tunnels (including the Cross-Harbour Tunnel and Aberdeen Tunnel).[3]

Time-varying tolls

On December 17, 2023, the government introduced "time-varying tolls" at the three road harbour crossings (the Cross-Harbour Tunnel, the Eastern Harbour Crossing, and the Western Harbour Crossing). Under this scheme, tolls for private cars vary according to the time of day (with higher "peak" rates and lower "off-peak" rates). To prevent drivers from accelerating or braking to avoid a toll change, the system uses "transitional periods" where prices increase or decrease by HK$2 every two minutes.[4]

In May 2025, the government took over the Tai Lam Tunnel and implemented similar time-varying tolls using the HKeToll infrastructure (significantly reducing the previously high fixed tolls).[5]

Future Pilot Scheme in Central

The government has conducted feasibility studies for an ERP Pilot Scheme in the Central District. The proposed implementation was linked to the completion of the Central–Wan Chai Bypass (which opened in 2019) to provide a toll-free alternative route for motorists. While the HKeToll technology is currently being used for tunnels, it is designed to be the technological foundation for any future congestion charging zones in Central and its adjacent areas.[6]

See also

References

  1. ^ a b Hau, Timothy D. (1990). "Electronic Road Pricing: Developments in Hong Kong 1983-89". Journal of Transport Economics and Policy. 24 (2): 203–214. JSTOR 20044505.
  2. ^ Cervero, Robert (1998). The Transit Metropolis: A Global Inquiry. Island Press. pp. 168–170. ISBN 978-1-55963-591-2.
  3. ^ "Free-flow tolling HKeToll to be launched at Cross-Harbour Tunnel". Government of Hong Kong. July 17, 2023. Retrieved December 28, 2025.
  4. ^ "Toll Plans for Road Harbour Crossings". Transport Department. Government of Hong Kong. December 17, 2023. Retrieved December 28, 2025.
  5. ^ "Government to take over Tai Lam Tunnel and substantially reduce its tolls on May 31". Government of Hong Kong. May 28, 2025. Retrieved December 28, 2025.
  6. ^ "Electronic Road Pricing Scheme in Central and its Adjacent Areas". Transport Department. Government of Hong Kong. Retrieved December 28, 2025.
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