ROAD DIVIDERS, TUNNELS and Traffic Infrastructure


Road dividers, noise barriers, bridges, overpasses and tunnels are exposed to high levels of traffic pollution. Cleaning and maintenance typically involves restricting traffic, but is necessary: reducing biofilm growth and water uptake increases durability of concrete structures, and cleaner surfaces also contribute to traffic safety. 

Night, rain and fog makes for poor visibility. Cleaner and brighter roadside surface give better contrast which makes driving easier and helps identify and prevent potential dangerous situations. Driving through a light grey or white tunnel is just much more comfortable than driving though a dark one – and the same reasons apply outdoors. Joma treated concrete gives much less darkening when wet, which is most of the autumn and winter.

Air pollution from traffic is not just a question of dirty surfaces, but also a human health issue.  NO2 from cars is a main contributor in poor urban air quality, society need to look at solutions beyond car emission regulations. A photocatalyst with high NO2 selectivity is a solution, and roadside surfaces such as noise barriers and road dividers are ideally suited for coating since they are close to the pollution source and relatively undisturbed.

Joma is located in Bergen, Norway, where the climate is wet, winters are dark, and poor air quality in winter has become a major political issue. We are conducting long-term field tests of air purifying, low maintenance coatings in cooperation with local and national road authorities.


  • ·         PROBLEM: Maintenance requires stopping traffic. Air pollution is a serious health issue, but hard to control without severely restricting traffic.
  • ·         SOLUTION: Joma offers solutions for protection and reduction of maintenance on traffic infrastructure, including self-cleaning and waterproofing concrete treatments as well as easy-clean tunnel paint. The patented nanoparticle structure has record high selectivity in breaking down pollutants from traffic.

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