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stable a unicorn at the Plain: fantasies about Oxford transport

Oxford, Transport — April 2024
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"The county should buy a unicorn and stable it on the Plain roundabout, where it will magically stop any collisions, alleviate all congestion, and make walking and cycling safe and accessible to all." This would probably make more sense than some of the transport proposals being bandied about - bus tunnels, removing cycling from main roads, etc. - but here I attempt to address some of the suggestions that seem sensible, but won't do what people want them to do.

Free public transport, segregated cycle tracks, School Streets schemes, traffic calming, Dutch style roundabouts, trams, and so forth are all potentially useful. But they only solve some problems, and in some cases require other measures to make them possible. They are not magically going to obviate the need for traffic removal and reduction - for low traffic neighbourhoods and measures such as traffic filters and the Zero Emission Zone.

free public transport

There is no funding for this, and if there were bus funding available it's not clear this would be the most effective use for it - expanding bus routes to serve disconnected villages might be higher priority.

And while free buses would help address transport poverty, it might not do much to reduce car use or alleviate congestion. Finland, for example, looked at the evidence and concluded: "According to research and trials, free transport systems offer no significant reduction in personal vehicular traffic, and its impact on cutting transport emissions has been limited".

segregated cycle tracks

Segregated cycle tracks would be great, but in some places (e.g. Iffley Rd) that is not impossible due to spatial constraints. In other places (e.g. Woodstock Rd) cycle tracks are only possible with removal of the bus lanes, which the bus companies will only accept if general traffic is reduced enough that buses don't get congested -- so the traffic filters and ZEZ and other traffic reduction schemes are necessary if we want segregated cycle tracks.

Road rebuilds with separate cycle tracks are also expensive: the Woodstock Rd scheme was going to cost over £4 million per kilometre. And provision of segregated cycling infrastructure on main roads is going to require removal of parking on them; anyone calling for segregated cycle infrastructure is, ipso facto, calling for all the parking on e.g. Cowley Rd to be removed.

People also need to be able to get to main road cycle tracks, which requires low traffic neighbourhoods.

School Streets schemes

School Streets schemes are great, but they are designed to reduce road danger in the immediate vicinity of schools, or on key walking and cycling routes, not to reduce traffic. They may do some of that, incidentally, but are most unlikely to remove more than 10% of school-run traffic. (What does reduce school-run traffic are LTNs in the areas around schools, because they provide safe routes for children all the way to and from school.)

traffic calming, chicanes, etc.

There's certainly a place for traffic calming, but it is not an alternative to traffic reduction. Howard St, for example, has speed humps that are probably too severe to be installed now, while Rymer's Lane has fourteen sets of hump-chicanes in 1.3km, but both of these were terrible when they carried 3000+ motor vehicles a day. (Without low traffic volumes, chicanes are horrible for cycling, as they force repeated merges with motor traffic; Dutch practice is to use speed humps for traffic calming.)

off-road cycling routes

More cycling routes would certainly be useful, but the easy ones have already been put in. And nowhere in Oxford do or would such routes preclude the need for cycling provision on main roads. Shifting any significant fraction of peak hour flows on Magdalen Bridge (1200+ cycles an hour) to the Thames path, for example, is not even remotely feasible; nor is shifting cycling from Longwall St to Queen's Lane.

a separate peripheral cycling track around the Plain

This is a great idea, but a redesign of the Plain with a Dutch-style peripheral cycle track would reduce its motor traffic throughput by perhaps 40%, so this would need the traffic filters, ZEZ, Workplace Parking Levy and probably more put in place first.

trams

Trams might make sense on some routes in Oxford, but tram lines are really expensive (£10 million a kilometre would be cheap, £25 million is probably more plausible) and since there's no separate space for them they would require a major reduction in private motor traffic to operate.

Some not at all plausible suggestions

bus tunnels

These made an appearance in the Local Transport Plan 4, but thankfully seem to have disappeared. Apart from costing hundreds of millions of pounds, if not billions, there's no space to put in entry and exit ramps, not to mention the lifts needed to get bus passengers to and from the surface.

remove all the LTNs

Quite apart from disabling cycling and walking, allowing through traffic through side streets unsuitable for it would, in most cases, fail a road safety audit. Consider the historical collision clusters at the bottom of Southfield and Divinity Rds, for example.

"We must first improve local bus and cycle routes and continue to promote electric car and van use. Only then should we think about traffic filters and LTNs"

There is no way to significantly improve bus services or cycling infrastructure without reducing motor traffic. LTNs are cycling infrastructure. And vehicle electrification will do nothing to help with congestion (in fact it will make it marginally worse, by reducing the per-kilometre costs of driving).

the future of Broad St

Oxford, Transport — April 2024

The legal changes to Broad St have been made permanent, but the current layout is clearly still temporary, in the sense that many of the features of the area no longer reflect its actual use. Most obviously, most of the existing kerbs are now redundant, or in the wrong place, and serve only as a trip hazard.

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sitting around

A proper plan for Broad St needs to be part of a redesign of the entire area of the city centre north of High St and east of Cornmarket, as envisaged in the Oxford Preservation Trust's proposals twenty years ago, and any such plan will be dependent on funding which is not yet available. But there are possibilities in the management of vehicle access and parking for improvements that could plausibly be implemented in the shorter term. more

Iffley Rd cycle lanes

Oxford, Transport — October 2023

What is the road layout on Oxford's Iffley Rd and how is it supposed to work? The key features here are the use of advisory cycle lanes around a narrow central traffic lane with no centre line; between Donnington Bridge Rd and the Plain the cycle lanes are mostly 1.575m wide and the central lane ranges from 4.66m to 5.93m wide. (This was implemented on Iffley Rd as part of the "Quickways" schemes in 2022. A similar scheme was implemented on Magdalen Bridge in 2020; there the cycle lanes are 2m wide and the central lane is 5m.) more

Enabling contra-flow cycling in Oxford

Oxford, Transport — September 2023

Contra-flow cycling should be allowed on all the one-way streets in Oxford. From LTN 1/20: "There should be a general presumption in favour of cycling in both directions in one way streets, unless there are safety, operational or cost reasons why it is not feasible." more

An East-West foot-cycle route for Oxford

Oxford, Transport — August 2023

This outlines a plan for a direct, coherent east-west foot-cycle route across Oxford's city centre. That would run from the railway station across the north of Frideswide Square, along Hythe Bridge St, George St, Broad St, Holywell St, and Longwall St, ending at Magdalen Bridge.
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school cycle training needs to be universal

Children, Transport — May 2023

The current cycle training provision in our primary schools is inadequate and inequitable.

Imagine if primary schools ran a course on finance for Year 5 children, provided for free and taught in school time, but only offered to those children who already have an understanding of the basics - who already know what an interest rate is, say - and who already have a bank account of their own. That would, rightly, be condemned as hugely regressive, teaching children who are already privileged and knowledgeable even more, and exacerbating existing inequalities.

But this is exactly how cycle training works, certainly in Oxfordshire and I think across most of the country. more

mental, social and community health gains from traffic reduction

Oxford, Transport — May 2023

Despite the research, I had always downplayed the psychological and social gains from traffic reduction, thinking of them as secondary to health improvements from increased physical activity - and perhaps as a bit "soft" and hard to measure. But my experience with the East Oxford Low Traffic Neighbourhoods has made me rethink this. more

the iceberg of road danger harm

Oxford, Transport — April 2023

Deaths and serious injuries — the target of Vision Zero — are just the tip of a much larger iceberg of road danger harm. In addition to the 20 road traffic fatalities and 450 serious injuries in Oxford over the last decade, there were 2800 reported slight injuries (all of those from the STATS19 police database) and (for cycling injuries, across Oxfordshire) ten times as many hospital admissions and attendances (this includes non-collision injuries which are rarely reported to the police). And there will be many minor injuries and collisions which are neither reported to the police nor result in hospital presentations. (Following Ling Felce's death at the Plain, I heard several people make comments like "Oh yes, I've been knocked off my bike twice at the Plain" and "No, I didn't report it either time.") There are even more near-misses and other incidents perceived as threatening. more

Lye Valley walking and cycling connectivity

Oxford, Transport — March 2023

Oxford's Lye Valley area has poor walking and cycling connectivity, making it one of the more car dependent areas inside the ring-road (looking at 2011 census commute data). Two key routes could be upgraded to improve this, to the west across Lye Valley to the Churchill Hospital and to the south west over the golf course.
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1) Put a proper foot-cycle track, with a bridge, across Lye Brook to the Churchill Hospital. 2) Upgrade the track across the golf course to Barracks Lane to an all-weather foot-cycle track, with a bridge across Boundary Brook to connect to Lye valley and potentially with zig-zags on the descent to Barracks Lane. This would require a legal change from a footpath to a bridleway. The likely form of any track would be a 3 metre wide shared path, with porous surfacing and embedded stud lighting, along the lines of the ones being put in across parks and fields elsewhere (e.g. across King Georges Field).) more

remove the signals at the George-Cornmarket junction?

Oxford, Transport — March 2023

I think consideration should be given to turning off the signals at the northern end of Cornmarket and having that junction operate like the Holywell junction at the other end of Broad St.
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I walk and cycle through this junction regularly, and there's pretty much always:

  1. a stream of pedestrians crossing on red across George St, as in the photo above - if they didn't they'd pile up and block the footways;
  2. pedestrians crossing haphazardly across the unsignalled Magdalen St West and Broad St arms, sometimes getting caught out mid-crossing by signal changes;
  3. mopeds and cycles going through red lights or using the wrong side of the road to turn from Broad St into Magdalen St West; and
  4. significant periods when buses and taxis and cycles are waiting even though the junction is clear.

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a School Streets scheme for the Charlbury Rd area?

Oxford, Transport — March 2023

The Charlbury Rd area in north Oxford has a major problem with road danger at school drop-off and pickup times. Large numbers of school-run vehicles arriving and stopping and departing in a short period of time create congestion, along with turning and reversing movements that endanger people walking and cycling.
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keep cycle and scooter parking off footways

Oxford, Transport — December 2022

Wherever possible, space for cycle or scooter parking should be taken from car parking space or spare carriageway space, not from footways or space for pedestrians. Pedestrians are at the very top of the transport hierarchy and private cars at the very bottom.

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the Oslo Street Design Manual

Transport — November 2022

The Oslo Street Design Manual (in English) is useful. In particular, it has guidance for cycling infrastructure provision in the presence of hills, which is lacking from Dutch guidelines and standards.

But a very important flowchart, for determining what cycling infrastructure is needed in different circumstances, has two errors in it!

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the key flowchart, with corrections

School Streets schemes in Oxfordshire

Oxford, Transport — November 2022

While the county should continue to support schemes for schools that request them, having that as the only way for schemes to happen will limit the effectiveness of the program. The county should proactively plan School Streets schemes at those locations where they will have the most effect. more

"decide and provide", the traffic filters, and cycling Magdalen Bridge

Oxford, Transport — October 2022

Oxfordshire's cabinet recently adopted a "decide and provide" approach for transport planning, but that doesn't seem to be informing the plans for the traffic filters in the Central Oxfordshire Travel Plan. The St Cross traffic filter and cycling on Magdalen Bridge provides one example of this. more

the Longwall-High junction

Oxford, Transport — July 2022

The junction of Longwall St and High St, in Oxford, poses some unusual design challenges. Along with Magdalen Bridge and the Plain roundabout, it is a key bottleneck in Oxford's transport network — this segment is probably the second busiest cycle route in the UK and likely the second busiest bus route. There are huge problems with this junction as it is, but the core schemes in the forthcoming Central Oxfordshire Transport Strategy offer a chance to redesign it.

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people cycling wanting to turn right into Longwall have to wait in a one metre wide lane with motor traffic on both sides

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new Warneford Lane cycle tracks

Oxford, Transport — July 2022

A look at the new Warneford Lane cycle tracks, put in in 4-7 July 2022.

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Kidlington roundabout design failure

Oxford, Transport — July 2022

The plans for redesigning the roundabout south of Kidlington are inconsistent with both the county's headline car-trip reduction targets, its active travel goals, and its Vision Zero commitment.

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traffic filters: Hythe Bridge St + Marston Ferry Rd

Oxford, Transport — May 2022
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How should the planned Oxford traffic filters work: what hours should they operate, what exemptions should there be, and so forth? To understand this, we need to understand their purposes:

  • to allow space and time to be reallocated to make walking and cycling safe and accessible, especially at junctions
  • to stop buses being congested and delayed, to have better and more efficient bus services
  • to free up space (and reduce noise and air pollution) for an improved public realm

But while the goals may be the same, the unique geography of each filter — and the very different roads they are on — means that they may need quite different implementations. This can be illustrated by Hythe Bridge St and Marston Ferry Rd. more

York as a model for central Oxford

Oxford, Transport, Travel — May 2022
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Based on a four day visit to York, I think its city centre should be a model for Oxford's. York has pedestrianised a huge chunk of its centre, and it's really great to walk around. After a bit it just feels entirely normal, just as it does in similarly pedestrianised European cities, and it really shows up just how horrible walking around central Oxford is.

At least during the daytime, outside loading hours, there are no cars at all, moving or parked in the core area of York. This means that one never has to think about traffic at all, or even about getting around parked cars, which makes for a completely different feel to bits of Oxford such as Catte St or Turl St or New Inn Hall St or Merton St or Pembroke St, where anyone walking is likely to encounter at least one moving motor vehicle and many parked ones. more

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