SDG 3, 7, 9, 11, 12, 13

N662 A58 roundabout

At the southern junction A58 Oost Souburg / Ritthem, the Marie Curieweg joins the Ritthemsestraat. This intersection will have a different traffic function in the future as intensities will increase as a result of various spatial and infrastructural developments (such as the arrival of the Justice Complex).

In addition, an accident analysis by the Department of Public Works revealed that it is desirable to design this intersection to be more traffic-safe. The task is to develop a traffic-safe solution that can handle future traffic flows.

A good solution to make this intersection traffic-safe and provide better traffic flow is through the construction of the traffic circle.

About this project

Client: Province of Zeeland

Contractor: KWS Infra B.V. Roosendaal

Period: The contract was awarded in November 2021. Completion is scheduled October 2022.

Work: the realization of a traffic circle, redevelopment of Ritthemsestraat, replacement of a culvert, reconstruction of Zandweg and renovation of the entire main carriageway of provincial road N662 including removal of a parking lane and two access lanes.

Type of procurement: open tender, award BPKV

this project contributes to the following Sustainable Development Goals (SDGs)


A traffic circle is the safest intersection form because it has fewer conflict points, lower speeds and a smaller angle of impact than a conventional intersection. Traffic circles are also safer for bicyclists and pedestrians than other intersection forms.


During construction, solar panels were used for lighting. This generated renewable energy for immediate use. The advantage is that no connection was needed for the temporary lighting poles during the evening and night.


To gain experience with a sustainable innovation, the first plastic road (CL version) was applied in Zeeland on this project. There is 47 meters of bike path constructed this saves 50% CO2 compared to a traditional variant (LCA).


During construction, reuse of raw materials was encouraged by awarding on MKI. This work used asphalt with PR Partial Recycling, concrete aggregate as a foundation and bike path elements made of recycled plastic. The project had an MKI value that was 40% lower than the baseline.


By working with emission-free machines, CO2 emissions have been minimized during work. An electric asphalt spreader, excavator and truck-mounted crane were used to perform this work. This saved 16 tons of CO2 and reduced noise emissions during work.


In the award, 4 quality elements were rewarded with a notional discount on the tender price:

  1. Environmental Management
  2. CO2 ambition
  3. Deployment of electric mobile equipment
  4. Environmental cost indicator

The environmental cost indicator (EQI) value is a measure of the environmental impact of a GWW work. The lower the MKI value, the less environmental impact.


The work was awarded to KWS Infra B.V. of Roosendaal. This contractor had a good plan of action (phasing and environmental plan), a high level of ambition with regard to the CO2 performance ladder, a maximum score for the use of electric equipment and a low total MKI value.

zero emission lighting
electric truck-mounted crane

kg CO2 avoided by electric equipment

grams of NOx avoided electric equipment

m2 plastic bike lane first in Zeeland

We make positive impact do you join us?

“I am proud that with this project we have achieved a lot with regard to circularity in the preparation and execution and the first to add the demand for deployment of electric equipment to the contract and thus reward it as well.”

Marko Verkaart, project manager Province of Zeeland

“We have deployed our own 100% electric asphalt spreading machine. The machine’s sustainability benefits are great. There are no local emissions of CO2 or particulate matter and this contributes directly to improving the living environment wherever the machine is deployed.”

Raymond van de Stadt, director asphalt company KWS

“Alone you go harder together you get further”

Together with the Province of Zeeland, we can be proud of what we have achieved in terms of sustainability in this project. In addition to saving CO 2 emissions, I am very proud that we will be building the first plastic road in this beautiful Province.

Johan Karelse, project manager KWS Infra

“In this project, we made an MKI calculation based on the specifications and challenged the market to lower it, in addition to CO2 and emissions transport.”

Arthur Siereveld, procurement consultant Province of Zeeland

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