Bracknell, Ascot and Worplesdon. From Junction 4 it bisects the northern Blackwater Valley conurbation then has its latest junction for Fleet and nearby early 21st century expanded/new villages, it crosses the South West Main Line, before skirting Old Basing and Basingstoke to its north. Turning south west again, it passes Popham and, just before reaching Junction 8, where one lane becomes the A303 which leads to Exeter and South West England. From here the motorway continues as a dual two lane road through open countryside and Micheldever Wood until it reaches the north of Winchester. Taking over the "Winchester Bypass" the M3 resumes to three lanes each way at Junction 9, continues directly south and then takes a small curve around the east of the city running through a deep cutting in Twyford Down and then proceeding south west again, crossing the South West Main Line]a second time alongside the River Itchen and through the Eastleigh urban-suburban area before crossing the Eastleigh to Romsey railway line and ending at the Chilworth Roundabout on the edge of Southampton. Road features The Spitfire Bridge carries the B3404 Alresford Road from Winchester over the M3 motorway and the parallel A272 (J9-J10 spur, known as the "Spitfire Link"). It replaced a concrete parabolic arch bridge under which a Curtiss P-40 had been flown by George Rogers in October 1941. It was generally assumed locally that the aircraft had been a Spitfire, hence the name. A private exit of the northern roundabout connected to Junction 4a provides access to the former UK headquarters of Sun Microsystems. As of 2018, this is now a new housing estate, Helios Park The section of the M3 between J2 and J4a has been converted into a smart motorway, with full opening on 30 June 2017. Incidents In the early morning of 25 April 1999, the drum and bass DJ and record producer Valerie Olukemi "Kemi" Olusanya, known as Kemistry, was killed on the M3 near Winchester by the steel body of a cat's eye, which had been dislodged by a van and flew through the windscreen of the following car in which she was a passenger. The coroner recorded a verdict of accidental death. A question was asked in the House of Lords about the safety of cat's eyes in light of the highly unusual incident, and the Highways Agency conducted an investigation into the "long-term integrity and performance"