In the United Kingdom, a Low Traffic Neighbourhood (LTN) is an area in which filtered permeability and traffic calming are deployed to reduce motorised through-traffic in residential areas. Many LTNs were introduced in spring 2020, although the same principles had been in use in London since the 1970s. [1]
LTNs can be implemented through the use of barriers such as bollards, boom barriers and planters; they can also be implemented virtually through the use of automatic number-plate recognition cameras and road signs, which can allow vehicle access for residents and emergency services while prohibiting unrelated through traffic. [2]
There is evidence to show that LTNs lead to a decrease in car use, increase in walking and cycling and a decrease in street crime, violent crime and sexual assaults. [3] [4]
Prior to the COVID-19 pandemic, there were already at least 25,000 modal filters across the UK. Low Traffic Neighbourhoods have been a common policy in designing new towns and communities in the UK since the 1960s. [5] [6]
In Primrose Hill, London, the death of two children on the roads in the 1960s led to the railway bridge on Regent's Park Road being closed to vehicles, using bollards. This made Primrose Hill an area without through traffic. [7] [8]
In Newtown, Exeter, Sandford Street and East John Street were closed to vehicles in 1970, using bollards and ramps, as part of a programme of urban renewal. [9]
One of the best known LTNs was implemented in De Beauvoir Town, Hackney, London, by the Greater London Council, designed by architect and local resident Graham Parsey. The modal filters were introduced as experimental measures on 8 April 1974 and made permanent in April 1975. [10]
During the COVID-19 pandemic of 2020–21, 72 Low Traffic Neighbourhoods with modal filters were rolled out under emergency legislation in London, covering a population of around 300,000. Waltham Forest had previously introduced a number of LTNs between 2015 and 2019. [11]
In London, prior to the Covid-19 pandemic, traffic had risen on side roads by over 100% since 2008. [5]
LTNs were implemented in Waltham Forest in 2014. In 2016, on three LTN 'boundary roads', traffic had increased by 2.6% and 28.3%. Two of the three roads were within the 'normal' range for recent fluctuations in traffic flow. For Sherhall Street, the only road studied that registered an increase, it was found that the 2016 traffic count was around the same as the 2009 traffic count for this road. [12] In the Walthamstow Village LTN, roads saw an average 44.1% reduction in traffic. Surrounding roads saw an increase in traffic, most notably Shernhall Street. On Lea Bridge Road, the maximum hourly traffic reduced after the introduction of the scheme and traffic appears more spread out across the day. For buses, the majority of buses through the Village were running very close to normal times. Though bus routes on boundary roads recorded an increase, this was in line with control routes across the borough. [13]
A 2022 study studied three LTNs in Islington Borough between July 2019 and February 2021. It found a 58.2% decrease in traffic compared with control sites in the same area. A smaller, statistically insignificant decrease of 13.4% was found on boundary sites. [14]
In three LTN areas in Southwark, traffic speeds decreased. Traffic levels remained unchanged on ‘boundary’ streets in two of these areas; in one, there was an increase in traffic levels during weekdays and peak hours. Walking and cycling counts remained approximately constant. [15]
A systematic review and meta-analysis of local authority data, on 46 LTNs introduced between May 2020 and May 2021 in 11 London boroughs, showed that car traffic within the zones almost halved, while on the boundary roads there was almost no effect on traffic. [16]
A 2023 Department for Transport review found that LTNs were "effective in achieving outcomes of reducing traffic volumes within their zones while adverse impacts on boundary roads appear to be limited". [17]
A 2022 study studied three LTNs in Islington Borough between July 2019 and February 2021. It found that LTNs had reduced the level of nitrogen dioxide by 5.7% on internal sites, and by 8.9% on boundary sites. [14]
Two LTNs were introduced in London between 2015-2019, after extensive consultation and with significant engineering improvements. Within the LTN areas, the numbers of injuries, and the risk of injury per trip, reduced by about 70% for walkers, cyclists, and car occupants. There was no change in injuries on LTN boundary roads. [18]
Some 72 LTNs in London were introduced in 2020, more hastily and with relatively few engineering measures. These halved injury rates (especially pedestrian injuries) on roads within the LTN zones; again, no change was found on boundary roads. [19]
The introduction of LTNs leads to a decrease in total street crime, increasing with duration since implementation, and with no displacement to other areas. After 3 years of implementation, a study found an 18% decrease in street crime in LTN areas. A larger reduction was found for violent crimes and sexual assaults. Only a single subcategory for crime saw an increase – bicycle theft. [4]
In Tower Hamlets Lutfur Rahman was urged by the Metropolitan Police not to dismantle a Low Traffic Neighbourhood in Bethnal Green, reflecting concerns that removing it would lead to an increase in crime. [20]
LTNs tend to encourage more active travel, shifting people from car use of these modes. [3] [21] Emergency rapid-implemented LTNs see more walking, cycling and improved perceptions of the local cycling environment. [22]
People in LTNs are becoming less likely to own a car and more likely to reduce their car usage. [3] In Waltham Forest, a study found that the number of cars and vans fell in mini-Holland areas, particularly in those involving an LTN. [23]
A 2020 study of the impact of the Waltham Forest LTN in London found no evidence that fire brigade emergency response times were affected inside LTNs and some evidence that they improved slightly on boundary roads, despite a perception among fire crews that traffic calming was the cause of some delays. [24] A 2021 study in Findings journal examined the impact of 72 LTNs in London on fire brigade emergency response times. It found no evidence that response times were affected, either for LTNs that use physical barriers, or for those that use camera enforcement. [11]
LTN implementation since 2020 in London has been broadly equitable at the city and micro levels. The most deprived quarter are more likely to live in a newly opened LTN than people in the least deprived quarter. Ethnic minorities are more likely to live in a newly opened LTN than White people. London Boroughs have, on average, implemented LTNs in their most deprived districts. [25]
Critics of LTNs also include green campaigners such as John Stewart and Rosamund Kissi-Debrah. [26] [27] Stewart has argued that LTNs are "inherently unfair" because "in most cases they simply displace traffic and pollution to the adjacent main and boundary roads", [26] while Kissi-Debrah also frames the problem in terms of social justice: she argues that affluent neighborhoods are more likely to benefit from traffic reduction and more-deprived areas more likely to suffer from the traffic displacement and added pollution. [28]
Modal filters and Low Traffic Neighbourhoods have sometimes been criticised for a number of reasons. The British motoring magazine Auto Express criticised the schemes for their levels of cost, calling them a "waste of money". Other criticisms include high fines and a lack of consultation in implementing the scheme. [29]
In the UK, the implementation of Low Traffic Neighbourhoods in 2020 was compared to Brexit in its divisiveness, [30] and there were speculations that the issue would affect election results. [31] [32] Opposition to the schemes has been linked to the "15-minute city" conspiracy theory, with the Institute for Strategic Dialogue describing the LTNs being used as a "lightning rod" for wider culture war issues. [33] The schemes have led to protests in Oxford and Croydon from anti-LTN activists. [34] [35]
The former actor Laurence Fox, when running for Greater London Mayor in 2021, pledged to remove all modal filtering (even those in place before 2020) in London. [5] On this platform, Fox received just 1.9% of first round votes. [36] In Hackney, a candidate standing on an anti-LTN platform in a by-election in Hoxton East and Shoreditch in May 2021 received fewer than 8% of votes, while in a by-election in St Peter's Ward in Islington an anti-LTN candidate received only 318 out of 4,395 of votes (7.2%). [37] [38] [39] [40] In May 2022 Lutfur Rahman was re-elected in Tower Hamlets having campaigned against the borough's LTN plans. [41]
In 2023 the UK's Department for Transport surveyed residents of trial LTN areas in London, Birmingham, Wigan, and York; an average of 45% of respondents supported the schemes and 21% opposed them. 58% were unaware that they lived in a Low Traffic Neighbourhood. [17]
The London Borough of Hackney is a London borough in Inner London, England. The historical and administrative heart of Hackney is Mare Street, which lies 5 miles (8 km) north-east of Charing Cross. The borough is named after Hackney, its principal district. Southern and eastern parts of the borough are popularly regarded as being part of east London that spans some of the traditional East End of London with the northwest belonging to north London. Its population is estimated to be 281,120.
Dalston is an area in London, England and is located in the London Borough of Hackney. It lies in North East London and is four miles northeast of Charing Cross. Dalston began as a hamlet on either side of Dalston Lane, and as the area urbanised the term also came to apply to surrounding areas including Kingsland and Shacklewell, all three of which being part of the Ancient Parish of Hackney.
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