Tarmac Group mixed concrete, asphalt and contracting businesses in the United Kingdom. Projects undertaken by or involving Tarmac Construction prior to demerger of that business in 1999 included the Preston Bypass completed in 1958, the St Albans Bypass completed in 1960, the Ahmed Hamdi Tunnel in Egypt completed in 1981, the Thames Barrier, the Joint European Torus and Drax Power Station all completed in 1984, the Merry Hill Shopping Centre completed in 1985, the Albert Dock refurbishment completed in 1988, the Conwy Road Tunnel completed in 1991, the Channel Tunnel completed in 1994, the Medway Road Tunnel completed in 1996, the Swindon
History of road transport the trusts and restrictions on the width of wheels - narrow wheels were said to cause a disproportionate amount of damage to the road. The quality of early turnpike roads was varied. Although turnpiking did result in some improvement to each highway, the technologies used to deal with geological features, drainage, and the effects of weather, were all in their infancy. Road construction improved slowly, initially through the efforts of individual surveyors such as John Metcalf in Yorkshire in the 1760s. British turnpike builders began to realise the importance of selecting clean stones for surfacing, and excluding vegetable material and