Lowering Speed Limits to 30km/h: Safer Cycling Without Traffic Delays, Study Finds (2025)

A simple speed limit change could be a game-changer for cyclist safety, but will it cause a stir among drivers? Slowing down cars to protect cyclists is a hot topic, and new research has some surprising findings.

According. to a study by RMIT University, reducing speed limits from 50km/h to 30km/h in residential areas could significantly improve safety for cyclists without causing major delays for drivers. The research team analyzed traffic stress levels on Melbourne's roads and discovered that lower speed limits doubled the amount of bike travel on low-stress streets, making it safer for kids and nervous riders.

But here's the catch: many existing cycle routes are on narrow paths alongside 60km/h roads, which can be terrifying for riders. Dr. Afshin Jafari, the lead researcher, emphasizes that slower traffic encourages more people to choose cycling as a safe transport option.

And the benefits don't stop there. The study, published in Cycling and Micromobility Research, reveals that the 30km/h limit barely impacts car travel times since it's only implemented on local streets, not main roads or highways.

This research is timely as Victoria introduces a new speed limit law, empowering councils to propose 30km/h limits in school zones and local streets. Dr. Elliot Fishman, an expert in transport, highlights the low cycling rates in Australia, despite the potential for short trips. He believes that safety concerns are the main barrier, and reducing speed limits could be a lifesaver, as evidenced by countries like the Netherlands, where 28% of trips are by bike.

And this is the part that might spark debate: Dr. Fishman suggests that it's not just about posting 30km/h signs but also redesigning streets to slow traffic. His research indicates that modal filters, which discourage shortcutting through residential areas, are highly effective for improving safety and cycling rates.

As Australia grapples with rising transport emissions, this simple speed limit adjustment could be a powerful tool to encourage active travel and create safer streets. But will it be enough to convince drivers to hit the brakes for cyclists? What do you think? Is this a fair trade-off for safer roads?

Lowering Speed Limits to 30km/h: Safer Cycling Without Traffic Delays, Study Finds (2025)
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