Targets :

• To reduce physical nuisances and noise pollution.

Innovation :

• New structure.

Advantages :

• Very often during the creation or the renovation of roadways, the manhole covers no longer match to the road level, thus causing pollution noise and discomfort for road users.
• The manholes' coverings of the invention perfectly fit to the road level because of their shape and conception. The traffic sounds and jolts are removed for road users.

• The new coverings can be re-used, which involves a drop in costs. This invention allows the combination of reduced nuisances and costs, and makes the laying easier.