Street space evaluation

[Robinlovelace]

Evaluation of spatial deliverability of cycle
infrastructure based on building line to building
line street widths and use of space by other
modes of transport.

This aims to:

• Assess the spatial deliverability based on comparing available B2B and/or carrriageway widths with total width required for recommended/proposed cycle infra & other modes (esp any dedicated infra)
• Help identify requirement for road-space reallocation when overlaid with proposed cycle networks (either NPT generated coherent network or LA uploaded proposed networks)
• Help identify best/least worst source of additional space available for reallocation
• Support future strategic (or network level) approaches to road-space reallocation (potential future functionality)

Will cover:

• All corridors potentially requiring dedicated infra (ie >20mph/2000pcu, not local access only/mixed streets)
• Data types as table below

High level approach:

• Categorise all links by width (e.g. Too Narrow, Maybe Wide Enough, Wide Enough)
• Derived/categorised approach adopted as NPT relies on licensed OS data (not shareable/extractable)

This involves

• Building to building (B2B) widths (critical)

• Obtaining and processing data on carriageway widths

• Incorporating estimates of road widths in segment level results

• Making results available in attributes at the segment level:

  • Existing carriageway width without lane removal at the form of 'traffic light' setting e.g. green "Wide enough" (~11 m+), "Maybe wide enough" (~9-11 m), "Not wide enough" (less than around 9m), 3 m vs 3.25.
  • For each of:
    • 2 x UniDirectional Segregated (4 m minimum, 3 absolute minimum)
    • 1 x bidirectional (3 m minimum, 2.5 absolute?)
  • With/without on street parking on one side / 2 sides
  • Removing one lane space. Attributes TBC, could also be traffic lights. Feedback from Sustrans will help here cc @anguscalder
  • Layer of is it wide enough without affecting cycling?
  • B2B width: issue with this is that authorities don't know where services are
  • Stretch Another categories e.g. upgrading of existing offroad routes with reference to lighting existing surface etc
    • Any datasets on land ownership/categories to help here?

• Example of open pavements data: https://www.arcgis.com/apps/webappviewer/index.html?id=783e530d92994246bcaeb7419437fd78

Currently ignores:

• Parking
• Loading
• Dedicated bus lanes (that need to stay)

We may be unable to publish the results in the user facing web app if we use licenced data.

[Robinlovelace]

Thinking about how to represent this, heads-up @mvl22, any thoughts let me know.

[Robinlovelace]

Width requirements:

• Absolute minimum: check out cross

TBC...

[Robinlovelace]

Red-amber-green for parking.