HONOLULU — Hawaiʻi has enacted two transportation measures establishing a statewide clean-fuel program and new rules for electric bicycles and other small electric mobility devices.
Governor Josh Green signed Senate Bill 2999, now Act 258, and House Bill 2021, now Act 259, as the state seeks to reduce transportation emissions while updating regulations for technologies becoming more common on its roads and sidewalks.
The laws address separate but connected areas of transportation policy: lowering the carbon intensity of fuels and creating clearer standards for electric bicycles and higher-speed electric devices.
A Statewide Clean-Fuel Program
Act 258 directs the Hawaiʻi Department of Transportation to establish a Clean Fuel Standard through rules scheduled to take effect by January 1, 2028.
Fuels with a lifecycle carbon intensity below the state’s annual standard would generate credits, while gasoline, diesel and other fuels above the standard would generate deficits. Providers could buy, sell or use credits to meet their obligations.
The program must remain technology-neutral, allowing electricity, renewable fuels and other lower-carbon alternatives to qualify based on lifecycle emissions.
The department must reduce the average carbon intensity of transportation fuels by at least 10% below 2019 levels by 2035 and at least 50% by 2045. Standards covering gasoline and diesel are scheduled to begin in 2029.
Aviation, military vehicles, railroad locomotives and interstate marine vessels are exempt, although some users may be allowed to participate voluntarily.
Supporters say the standard could encourage investment in renewable electricity, alternative fuels and waste-derived energy. Its effects will depend on the rules adopted, credit prices and the availability of competitive lower-carbon options.
The law also requires cost-containment measures, public information sessions in every county and regular reporting on emissions reductions and market activity.
New Rules for Electric Bicycles
Act 259 establishes a statewide framework for electric bicycles and other micromobility devices.
The law classifies e-bikes according to operating speed and motor assistance. It requires labels identifying each bicycle’s classification, assisted top speed and motor wattage, while sellers must disclose where a device may legally operate.
Electric bicycles must be registered, and riders under 18 must wear helmets. Wheelies, stunts and other unsafe behavior are prohibited on public rights-of-way.
Devices exceeding 750 watts or capable of traveling faster than 28 miles per hour are classified as high-speed electric devices and cannot be used on public roads, sidewalks, bicycle lanes or other public areas.
Counties may impose additional restrictions, while the Transportation Department will develop further rules and public guidance.
Part of a Wider Transportation Transition
Hawaiʻi’s legislation reflects a broader shift as governments seek to reduce transport emissions while regulating electric vehicles, alternative fuels and new forms of mobility.
Public policy leaders are increasingly combining fuel standards, vehicle rules, tax incentives, charging infrastructure and public-transit investment rather than relying on a single measure.
California’s Low Carbon Fuel Standard provides one model for Hawaiʻi’s credit-based system, although debates over fuel costs and biofuel eligibility show the challenges such programs can face. The European Union has taken a broader approach, linking vehicle-emissions rules with charging and alternative-fuel infrastructure targets.
In many emerging markets, electric buses, motorcycles and commercial fleets are advancing faster than private electric cars, underscoring that the transition is shaped by local infrastructure and economic conditions.
For Hawaiʻi, geographic isolation, imported-fuel dependence and differing transportation needs across the islands will shape how effectively the policies work.
Implementation Will Determine the Impact
The clean-fuel program will not be fully defined until the Transportation Department completes its rulemaking. Its effect on fuel prices, electricity demand and investment will depend on the annual standards, credit-market design and cost controls.
The e-bike law will similarly depend on public education, retailer compliance and coordination among state agencies, counties and police departments.
Together, the measures place Hawaiʻi within a wider transportation transition while responding to its particular economic and geographic conditions. Their impact will depend on how effectively the regulations and infrastructure that follow translate the legislation into cleaner and safer mobility.
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