The A405 is a 4.8 miles (7.7 km) dual carriageway road in Hertfordshire,

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

, from the A41 at Leavesden Green, near

Watford Watford () is a town and borough in Hertfordshire, England, 15 miles northwest of Central London, on the River Colne. Initially a small market town, the Grand Junction Canal encouraged the construction of paper-making mills, print works, and ...

, to the A414 at Park Street Roundabout near St Albans.

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 Traffic lights, traffic signals, or stoplights – known also as robots in South Africa are signalling devices positioned at road intersections, pedestrian crossings, and other locations in order to control flows of traffic. 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 Bricket Wood is a village in the county of Hertfordshire, England, south of St Albans and north-northeast of Watford. History The area of Bricket Wood was mostly occupied by farmers until Bricket Wood railway station was built in 1861. In 18 ...

, 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. After the M25, the A405 continues northeast, with a roundabout junction with the B4630 for

Chiswell Green Chiswell Green is a village, to the south of St. Albans, in the parish of St Stephen and district of City of St Albans in Hertfordshire. It has a population of approximately 2,800. It is in the civil parish of St. Stephen. It is located on the ...

(3.6 miles, 5.8 km), then another with Tippendell Lane for

How Wood How Wood is a residential village, south of Park Street village between the towns of Watford and St Albans in St Stephen civil parish, Hertfordshire, England. The district council (in this instance, mid-tier of local government) is the City and ...

(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.

Earlier route

The A405 originally took up a greater proportion of the ''North Orbital Road''. From Park Street Roundabout, it travelled east, crossing the

River Ver The Ver is a long chalk stream in Hertfordshire, England. It is a tributary of the River Colne. Course The source is in the grounds of Lynch Lodge, Kensworth Lynch on the west side of the A5 trunk road and stays on the west side for som ...

and the

Midland Main Line The Midland Main Line is a major railway line in England from London to Nottingham and Sheffield in the Midlands. It comprises the lines from London's St Pancras station via Leicester, Derby/Nottingham and Chesterfield in the East Midlands ...

before meeting the A6 (now the A1081) at

London Colney London Colney () is a village and civil parish in Hertfordshire, England. It is located to the north of London, close to Junction 22 of the M25 motorway. It is near St Albans and part of the St Albans District. At the time of the 2001 census ...

. It then veered northeast, past Colney Heath, before ending at the A1 near Hatfield. This gave it a total length of 9.7 miles (15.6 km). The section of the A405 east of Park Street Roundabout was re-designated as part of the A414 (the original St Albans–Hatfield section of that road becoming the A1057). In 1976, extending westwards to bypass

Rickmansworth Rickmansworth () is a town in southwest Hertfordshire, England, about northwest of central London and inside the perimeter of the M25 motorway. The town is mainly to the north of the Grand Union Canal (formerly the Grand Junction Canal) and ...

, the A405 joined the A412 at Maple Cross. In 1985, this section became part of the M25 motorway between junction 17 and junction 19. Junction 18 in Chorleywood is with the A404 was built in 1978.

References

External links

Road to Nowhere: A405
{{DEFAULTSORT:4-0405 Roads in England Roads in Hertfordshire