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The A405 is a dual carriageway road in Hertfordshire, England. At present, it is 4.8 miles (7.7 km) long and runs from the A41 at Leavesden Green, near Watford, to the A414 at Park Street Roundabout near St Albans. It forms part of the ''North Orbital Road'', an uncompleted outer ring road around London. == Present route == The A405 starts at a grade-separated roundabout junction with the A41 at Leavesden Green. From here, it travels northeast to a crossing with Sheepcot Lane at Woodside, then east to a traffic light junction with the A412 near Garston. This 1.4-mile (2.2-km) section is known as ''Kingsway''. From the A412, the A405 travels north, past West Hertfordshire Crematorium and Penfold Park Golf Course, to junction 6 of the M1 at Waterdale (2.3 miles, 3.7 km). It then veers northeast, passing the village of Bricket Wood, before meeting the M25 at junction 21a (3.1 miles, 5 km). Drivers wishing to access the M25 from the M1 northbound, or the M1 southbound from the M25, must use this section of the A405 as the junction between the two motorways, known as Chiswell Interchange, does not feature the corresponding slip roads.〔(【引用サイトリンク】title=Bad Junctions: M1-M25 (Chiswell Interchange) )〕 After the M25, the A405 continues northeast, with a roundabout junction with the B4630 for Chiswell Green (3.6 miles, 5.8 km), then another with Tippendell Lane for How Wood (4.2 miles, 6.8 km). The road terminates at Park Street Roundabout, a junction with the A414 and the A5183 (formerly part of the A5); until 2009 this was junction 1 of the M10. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「A405 road」の詳細全文を読む スポンサード リンク
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