It overlaps the £3.5 million (£ as of ), A601 Derby Inner Ring Road, which is called "St Alkmunds Way" and was opened on 30 July 1972. It is used by 70,000 motorists daily as they pass under the 2007 footbridge towards Pentagon Island. From the Radio Derby building (to the west of the city centre) to Nottingham, it is dual-carriageway. It crosses the River Derwent, the A601 leaves to the south, and it passes under the Midland Main Line as "Eastgate". There is the "Pentagon Island" Grade Separated Junction (GSJ) with the A61 near Chaddesden and the Texaco "Pentagon Service Station". The westbound-direction is not grade-separated and meets the roundabout, thus causing many severe queues at rush-hour. Westbound traffic would be better choosing another route from 8 to 9am. It passes a large Costco, and the next junction is a GSJ for the Wyvern Retail Park, and passes a KFC, McDonald's, Pizza Hut and Sainsbury's. Near Spondon, there is a large GSJ with the A5111 Derby outer ring road ("Raynesway" - home of Rolls-Royce Marine Power Operations), also near a large Asda. The £4.6 million (£ as of ), Borrowash Bypass Extension, from "Raynesway" to "Megaloughton Lane" opened on 29 May 1980 as well the £6 million (£ as of ), Nottingham Road Diversion, from the Pentagon Island to "Raynesway". Both sections totalled . before Borrowash, it enters the Borough of Erewash.