The new A140 bypass in Norfolk is a single carriageway road that provides a new junction at Church Lane to the north and extends from this junction on the east side of Long Stratton in a southerly direction for approximately 3.9km, where it re-joins the existing A140 just south of Oakside farm.
ABG proposed the value engineered and BBA approved Fildrain 7DD/ST170 geocomposite as an alternative to a 6C drainage stone layer. Fildrain has a 7mm thick central drainage core with a geotextile bonded to both sides and the 7DD product variant features a double sided core to channel water from above and below.
The lightweight Fildrain geocomposite is supplied in rolls up to 4.4m wide, offering rapid coverage rates and significant delivery savings. One delivery of Fildrain is the equivalent to approximately 100 x 6C stone deliveries, and the specification of the all-in-one geocomposite starter layer has greatly reduced vehicle movements, carbon emissions and local congestion as a result. To read more about this project the case study can be found here