In Britain the term "cycle street" is not well known and there seem to be few implementations. I am talking about what the Dutch call a fietsstraat, the French a vélorue and the Germans a Fahrradstraße; a "bicycle boulevarde" in the United States.
The Ranty Highwayman has a good explanation (focusing on Dutch implementations) and here is a translation from Guide des Aménagements Cyclables:
A cycle street is a street that accommodates transit bicycle traffic and only local motorized traffic. In some countries, a cycle street is defined by regulations and may, for example, prohibit overtaking (Belgium), or authorize several people to ride abreast (Germany). In the Netherlands, it has no regulatory basis, but is the subject of specific recommendations:
- cycles must be able to take over the carriageway: this is the case regardless of the volume of cycles as soon as motorized traffic is less than 500 vehicles per day. Ideally, cycle traffic is at least twice as high as motorized traffic, with a limit for the latter set at 2,000 vehicles per day.
- the cycle street has priority at intersections over cross streets.
- the roadway has the same surface as cycle paths (red asphalt in the Netherlands).
So, a cycle street is a low traffic, low speed street with a lot of cycling on it, optimised for cycling priority, comfort, speed, wayfinding, etc. It needs to be designed to either prohibit (Germany and Belgium) or deter motor vehicles from overtaking people cycling.
Oxford has what seems like an attempt at a cycle street in the eastern half of Jack Straws Lane. Because of the gradient, this needs lower traffic volumes to work - a modal filter would do the trick.
Here is a video about a cycle street in Vienna
Some other examples:
Because these are not (except in the Netherlands) traditional parts of highways toolkits, there isn't much consistency about their layout. The "wide yellow stripes on each side" is specific to Paris and is pretty much the reverse of the Brussels layout.
Oxford Possibilities
In Oxford, the following routes are candidates for cycle streets:
- the southern half of Parks Rd, from Broad St up to the South Parks junction.
- Hythe Bridge St-George St-Broad St-Holywell St-Longwall St
- Including a cycle track across Frideswide Square, this would provide east-west connectivity across the city centre.
- It would require motor traffic shifted from Hythe Bridge St to Park End St, buses shifted from George St and the Magdalen Sts to Beaumont and St Giles, and a bus gate on Longwall St.
- Bainton Rd - Hayfield Rd - Kingston Rd (to the St Margarets Rd junction)
- about 1km, could be continued into Jericho if traffic there was reduced
- Midddle Way - Stratfield Rd
- 800 metres
- has a "kink" at South Parade, where relatively high traffic volumes would complicate providing priority to the cycle route
- Catherine St - Hurst St - James St
- Hurst St (from Telraam data) has around 780 cycle and 370 motor vehicle movements per day.
- 850 metres
- has a kink at Magdalen Rd, where it might be possible to give the N-S cycle route priority over E-W traffic (would be easier if that wasn't open to taxis)
- should be resurfaced (ahead of Percy St and Aston St)
- should have priority at the junctions with Percy and Charles Sts (the current give-way markings reflect old E-W motor traffic flows, but the N-S cycle flows are now much higher)
- Rymers Lane - Cricket Rd
- 1.2km long, could be extended to Magdalen Rd, via Drove Acre and Ridgefield
- needs the more aggressive humps softened (or made bypassable by cycles)
- may have too much motor traffic at its southern end - Telraam data suggests motor traffic is only just under the 2000pcu/day threshhold (and includes HGVs accessing the retail park) and is 80% higher than cycle traffic
- Fyfield Rd - Norham Gardens
- 650 metres
- possibly too wide to allow car overtakes to be constrained
- Edgeway Rd? Fairacres Rd?
Full rebuilding of these streets (as in the Dutch example) would be expensive. But these streets should be given priority at junctions (so the give-way markings should be switched at the junctions of Catherine St with Percy and Charles Sts) and, when/if they are resurfaced, provided with a three metre wide central lane in a distinctive colour asphalt, marked with cycle symbols.





Wikipedia lists names and types of cycle street under the heading 'Bicycle boulevard':
https://en.wikipedia.org/wiki/Bicycle_boulevard
Yes! Marking busy routes with occasional white painted bikes is not enough. Your suggestions are excellent and would be very positive. Let's add the route 5 cycle route from the university Parks through Dtagon Lane along Charlbury Rd. Mansfield Rd seems a good candidate too.
Fantastic work Danny!