Impact of the CS11 proposals on traffic capacity, bus journey times and pedestrian crossing times

Closed 20 Mar 2016

Opened 8 Feb 2016

Overview

We have carried out detailed traffic modelling on the proposals for Swiss Cottage, the Outer Circle and Marylebone Road, to understand what impact the proposed changes would have on general traffic, buses and pedestrians. The traffic models take into account changes which have been proposed by  Westminster City Council for the Baker Street two-way scheme as well as changes planned by the London Borough of Camden as part of the West End Project.

Traffic modelling has been carried out to study the traffic impacts of the scheme at the busiest times of the day, and results are presented for both the morning and evening peak hours. Modelling presents the worst case scenario in terms of traffic impact. TfL would actively monitor and manage the road network following implementation to ensure impacts were balanced.

Traffic modelling has been carried out in two parts. The northern end of the route has been modelled from Swiss Cottage to Marylebone Road, to assess impacts on traffic travelling on the A41 and in the surrounding area. A table showing likely journey time impacts on traffic, buses, cyclists and pedestrians can be found below.

Click here for journey times and pedestrian wait times - Swiss Cottage to Marylebone Road (PDF)

The second part of the modelling assesses the impact on traffic travelling eastbound or westbound on Marylebone Road. A table showing likely journey time impacts on traffic, buses, cyclists and pedestrians can be found below. 

Click here for journey times and pedestrian wait times - Marylebone Road / Euston Road (PDF)

If you have any quesitons or clarifications with regards our traffic modelling please email [email protected] for more information.

 

General traffic

The changes being proposed are likely to mean that journey times for general traffic can be expected to improve significantly at certain times of day, particularly southbound traffic during the morning peak. However, some other journeys  would be slightly longer at certain times of day, particularly in the westbound direction through Swiss Cottage during the morning peak. We are investing in advanced traffic signal technology to allow us to better manage traffic depending on differing conditions at any given time, and we are working to improve road user information so people can make informed journey choices before they travel.

Buses

The changes to the road layout proposed as part of CS11 would have an impact on the operation of the bus network and passenger journeys, particularly around Swiss Cottage. The removal of the one-way system and the proposed banned turns would mean that some bus routes through the area would have to stop in different locations. Swiss Cottage is an important location for passengers to interchange between buses, as it is served by eight different routes which connect the area to different parts of London. Around 12,000 trips per day are made to and from bus stops in Swiss Cottage, while around 22,000 bus trips pass through the area per day.

The modelling suggests that journey times for bus routes would change, with the proposals resulting in a reduction in journey time on some routes, while other routes would see an increase in journey times. In particular, the routes which run east and westbound through Swiss Cottage along Adelaide Road will be impacted with delays of up to 7 minutes expected on routes C11 and 31.

Journey time changes for all routes can be seen in the table above. The changes on the five routes which are most significantly impacted, either positively or negatively, are described in more detail below.

Route 13, between Aldwych and Golders Green.

A reduction in journey time on route 13 during the morning peak in both directions would be likely. In the northbound direction towards Golders Green there would be a small reduction in journey time of up to 1 minute, while in the southbound direction towards Aldwych a journey time saving of between 5 and 7 minutes would be expected as the bus takes less time to get between Arkwright Road and St John’s Wood Road.

In the evening peak route 13 would be likely to see an increase in journey time, taking up to 2 minutes longer in the southbound direction with most of the delay occurring between Boundary Road and St John’s Wood Road.

Route 31, between White City and Camden Town

A significant increase in journey time in the westbound direction towards White City of 5 to 7 minutes in the morning peak would be likely. This delay would occur on Adelaide Road as it approaches the junction with Avenue Road. The 31 towards White City would continue to serve stop L on Finchley Road, continuing to Fairfax Road.

Currently the 31 towards Camden Town uses Finchley Road and Avenue Road to get round the one-way system. Under our proposals it would stay on Adelaide Road in the eastbound direction and a new stop would be provided outside the library. There would be a smaller increase in journey time of 1 to 2 minutes in the eastbound direction towards Camden Town occurring on Hilgrove Road on the approach to the junction with Finchley RoadIn the evening peak modelling suggests only a minor increase in journey time of under 1 minute on the 31 in both directions.

Route 113, between Edgware and Marble Arch

Modelling suggests a journey time saving on the 113 in the morning peak in the southbound direction towards Marble Arch. We would expect a reduction in journey time of 8 to 10 minutes due to improved traffic flow between Arkwright Road and Gloucester Place. In the northbound direction towards Edgware we would expect a decrease in journey time of around 30 seconds.

In the evening peak the modelling suggests there would be an increase to journey times of 2 to 3 minutes in the northbound direction towards Edgware. This delay would be distributed over the length of the route as the bus travels between Gloucester Place and Hendon Way with no particular section of the route generating the delay. In the southbound direction in the evening peak a delay of 1 to 2 minutes is likely. The majority of this delay is likely to occur between Boundary Road and St John’s Wood.

Route 268, between Golders Green and the O2 Centre (on Finchley Road)

In the westbound direction (through Swiss Cottage) towards the O2 Centre, the 268 would be likely to see very little change to journey time in either the morning or the evening peak, with an increase of under 30 seconds. Currently in this direction the 268 uses Avenue Road and Finchley Road to get round the Swiss Cottage one-way system, and this would not change under the proposals.

Towards Golders Green the 268 currently turns left from Finchley Road into College Crescent. It would be rerouted to serve stops on Avenue Road and Finchley Road towards Golders Green (as it already does towards the O2 centre). This is because of the proposed banned left turn from Finchley Road into College Cresecent. This longer route would mean journey times would be likely to increase in the morning peak by 3 to 4 minutes. In the evening peak there would be an increase of around 1 to 2 minutes.

Route C11, between Archway and Brent Cross Shopping Centre

In the morning peak the C11 towards Archway is likely to see a decrease in journey time of up to 2 minutes. However, towards Brent Cross Shopping Centre an increase in journey time of 5 to 7 minutes would be likely, occurring as the C11 heads west on Adelaide Road.

In the evening peak the C11 would be likely to see an increase in journey time of 1 to 2 minutes in both directions. This delay would occur on Adelaide Road and Finchley Road.

Pedestrians

The proposals include major changes to pedestrian crossing facilities throughout the length of the scheme. Existing pedestrian crossings at Swiss Cottage are staggered and often involve several stages. We have replaced these with straight pedestrian crossings wherever possible, and simplified staggered crossings into just two stages where it is not possible to provide a straight crossing. Although straight pedestrian crossings often involve a slightly longer wait time, pedestrians can cross in one movement rather than waiting at a central island, which is preferred.

Traffic reassignment

General note on modelling

It is important to note that our traffic reassignment modelling is only ever indicative; it is intended to give an idea of where the impacts of changes in journey choice are most likely to be felt. It assumes that drivers have perfect knowledge of the network and will always choose the quickest route available. The reassignment is a picture of what the network may look like once the on-street proposals and associated driver behaviour has had a chance to bed in.

We would actively monitor and manage traffic conditions on the roads following the delivery of the scheme, and would aim to mitigate and manage traffic reassignment following implementation. We are investing in advanced traffic signal technology to allow us to better manage traffic depending on differing conditions at any given time, and we are working to improve road user information so people can make informed journey choices before they travel.

Swiss Cottage

The changes to the road layout predominately around Swiss cottage and access to The Regent’s Park would lead to some traffic taking a different route. Some local roads are likely to see an increase in traffic because of our proposals, while other roads would see a reduction in traffic volumes.

In the vicinity of Swiss Cottage the removal of the one-way system is likely to cause some vehicles to reassign onto local roads in both the morning and evening peak. In the morning peak, due to reduced capacity our modelling suggests there will be reduced flow along Fitzjohn’s Avenue and Belsize Avenue leading into College Crescent and through Swiss Cottage. As a result there is an increase of traffic through the Hampstead and Belsize Park area particularly on Agincourt Road, Arkwright Road, Fleet Road and Parkhill Road, in the morning. Other roads that have been indicated which may be affected are West Heath Road and Hampstead High Street.

To the West of Swiss cottage there is predicted to be some increase in traffic on Loudoun Road, Fairfax Road and Goldhurst Terrace. There is also likely to be additional queuing on both Adelaide Road and Hillgrove Road on the approaches to Finchley Road.

Currently the one-way system encourages southbound drivers to remain on Avenue Road south of Swiss Cottage towards Regent’s Park. Removing the one-way system alters driver’s choice and leads to a substantial drop in traffic on Avenue Road south of Swiss Cottage during both the morning and the evening peak, although modelling suggests some traffic is likely to re-join Avenue Road further south after Elsworthy Road.

As part of our proposals we are proposing to close Queen’s Grove at its junction with Avenue Road to all traffic except cyclists, to reduce through traffic. This would lead to a reduction in traffic on Elsworthy Road eastbound and other local residential streets during both the morning and the evening peak. A reduction in traffic is also likely on the residential streets between St John’s Wood and Maida Vale.

The Regent’s Park

Removing through-traffic from the Outer Circle means that many vehicles currently using this route will have to seek alternatives. Our modelling suggests that while many vehicles will take an entirely

different route into London, avoiding this area completely, there would still be an increase in traffic on Prince Albert Road and Albany Street in both the morning and the evening peak. The modelling suggests traffic reassigns onto roads to the east of the park rather than to the west. However, traffic flows through Hanover Gate would increase due to access restrictions at other gates. Access restrictions proposed at York Gate, Park Square West and Park Square East would mean there is likely to be a drop in traffic on streets immediately to the south of The Regent’s Park, particularly on Park Crescent and Portland Place.

 

Areas

  • Camden
  • Westminster

Audiences

  • Public
  • Stakeholders
  • Local residents
  • Local businesses
  • Schools
  • London Boroughs
  • Coach Operators
  • Taxi trade
  • Transport for London
  • Taxi customers and other stakeholders

Interests

  • Roads