Uppsala, Sweden, has a busy road passing a school on the way to a large hospital. More than 15,000 vehicles use this route each day. There are also zebra crossings used intensively by pedestrians. During the day, the maximum speed here is 30 km/h. That increases to 40 km/h overnight. To improve the safety of all road users, the local authority installed Actibump in all lanes. An independent research firm investigated its effect upon speed, driver behaviour and noise levels. Its main conclusions were as follows:
- The average road speed fell by 5.5 km km/h.
- Before installation, 75% of road users drove too fast.
- After installation, only 21% drove too fast.
- The average noise level decreased from 69.2 dBA before installation to 65.4 dBA afterwards.
The Swedish city of Malmö had a persistent problem with speeding on a number of roads. To make them safer, the local authority decided to install Actibumps. A few months later, research was conducted into the results from from the first three installations. Its main conclusions were as follows:
- Traffic speeds at all locations fell to the applicable limit (+/- 3 km/h).
- Traffic-induced ground vibrations were minimised.
- Noise levels were lower.
- Top speeds were lower.
Perth (Australia) – Curtin University Campus
The official speed limit on the campus of Curtin University in Perth, Australia, is 40 km/h, but in practice drivers were averaging around 55 km/h. Nearly 65% went too fast. Four Actibumps were installed during winter 2017/2018. Ten months later, the average share of speeding offences had decreased by 78.7%.
Results per Actibump:
Percentage of speeding drivers
After 10 months