Harrogate Road, New Junction Line Improvement Scheme, BradfordDownload Case Study
Congestion reduction scheme on a busy intersection. Major improvements to the existing
junction including widening the existing highway on all four approaches to the junction, signal upgrades and a P-loop. Cyclists and pedestrians will also benefit from the scheme with the addition of new cycle lanes, pedestrian islands, and more controlled crossings.
8,000 tonnes SHW Clause 803 Type 1 Subbase.
Bradford Metropolitan District Council.
Howard Civil Engineering LTD.
68 Week project completed in Autumn 2021. Widening all four approaches to Greengates
Junction totaling 580m of existing carriageway, 70m of new carriageway. The Incinerator
Bottom Ash Aggregate (IBAA) Type 1 subbase is being laid at varying depths; Road
carriageway 370mm, Footpaths 100mm, Car Parking Bays 150mm. The subbase is being
placed directly onto the subgrade.
IBAA is an extremely cost-effective material when compared to Primary Aggregates and BP UK is working towards a verified Carbon Footprint. There are also advantages logistically when using IBAA due to the low density of the material allowing for fewer vehicle movements as this gives volumetric advantages over primary materials.
The extraction of primary aggregates for construction and transport to construction sites places enormous pressure on the environment. Mineral mining accounts for 2.8% of the global greenhouse gas emissions. The use of manufactured aggregates from IBA prevents landfilling, mining of virgin raw materials and contributes to the circular economy.