What Hawai‘i’s New E-Bike Law (Act 259 / HB2021) Means for Riders

Hawai‘i's e-bike rules changed with HB2021, now referred to as Act 259. According to the Hawai‘i Bicycling League (HBL), the law changes restrictions for e-bike users, defines "High-Speed Electric Devices," bans mopeds from using bike facilities, and requires helmets for those under 18 on certain devices. If you ride an e-bike, an electric micromobility device, or a moped in Hawai‘i, the practical takeaway is that the device you ride now determines where you can ride it and what gear you need — so it's worth confirming which category your device falls into before your next trip.

What Act 259 changes

HBL summarizes the bill around four main points:

• E-bike restrictions change. Rules for e-bike users are updated under the new law.
• "High-Speed Electric Devices" are defined. This creates a distinct category of device with its own treatment.
• Mopeds are banned from bike facilities. Mopeds can no longer use bike lanes and similar bicycle infrastructure.
• Helmets are required for riders under 18 on certain devices.

HBL notes the bill is "a big one" and provides a breakdown of key takeaways and essential points for riders who want the full detail.

Why the device category matters most

The common thread across these changes is classification. Where you're allowed to ride and what you're required to wear depend on how your device is defined — e-bike, High-Speed Electric Device, or moped. Two riders on visually similar machines could face different rules if their devices fall into different categories.

A concrete example: a rider on a moped who previously used a bike lane to avoid traffic now needs a different route, because Act 259 bans mopeds from bike facilities. Meanwhile, a rider under 18 on a device covered by the helmet requirement needs to gear up regardless of how short the trip is.

What to check before you ride

1. Identify your device's category under Act 259 — e-bike, High-Speed Electric Device, or moped. HBL's breakdown is the starting point for this.
2. Confirm where that category may operate, particularly whether bike facilities are open to you.
3. Check helmet requirements if you're under 18 or riding with someone who is.
4. Review the full key takeaways rather than relying on summaries, since the bill covers multiple device types at once.

Where to get the details

HBL publishes a plain-language breakdown of Act 259 with key takeaways and essential points, plus additional e-bike resources and a workshop finder for riders who want hands-on guidance. If you ride an e-bike or electric micromobility device in Hawai‘i, those HBL materials are the most direct route to understanding how the new law applies to you.