Weight: 8/25 of overall CLoS
Evaluates traffic risk to cyclists using 4 of 8 LTN 1/20 safety criteria.
Speed (S10): 85th-percentile speed estimated from OS NGD mean speed (×7/6 conversion); scored against LTN 1/20 thresholds (>37 mph critical fail, 30–37 red, 20–30 amber, <20 green); off-carriageway facilities score green.
Volume (S11): AADT from DfT counts (major roads) or Poisson regression (minor roads); >10,000 critical fail, 5,000–10,000 red, 2,500–5,000 amber, <2,500 green.
Segregation (S12): LTN 1/20 speed–flow–facility adequacy matrix assessing whether cycling provision type and width matches traffic conditions.
Kerbside conflict (S15): Cycle lane width as proxy for conflict with parked vehicles, loading, and door openings; off-carriageway facilities are exempt.
Each link is scored 0–2 per criterion; the route score is a length-weighted average.
Weight: 5/25 of overall CLoS
Measures how pleasant and inviting a route feels, using 3 of 5 LTN 1/20 attractiveness criteria.
Lighting (A21): Scored from OS NGD street lighting coverage; fully lit scores green, mostly lit scores amber, mostly unlit and fully unlit score red.
Isolation (A22): Uses OpenStreetMap point-of-interest density as a proxy for social safety and natural surveillance; links with no nearby activity score red, higher POI density scores progressively better.
Cycle parking (A25): Proximity to nearest cycle parking in OpenStreetMap; within 200 m scores green, 200–500 m amber, beyond 500 m red.
Each link is scored 0–2 per criterion; the route score is a length-weighted average.
Weight: 4/25 of overall CLoS
Assesses ride quality using 1 of 4 LTN 1/20 comfort criteria.
Minimum widths (C19): Scored only where dedicated cycling provision exists; compares recorded cycle lane widths against LTN 1/20 desirable minimums, applying different thresholds for one-way and two-way facilities. Mixed traffic links are excluded.
If the route has no dedicated cycling provision, comfort is excluded and the remaining dimensions are re-weighted.
Weight: 5/25 of overall CLoS
A route-level metric using 2 of 5 LTN 1/20 directness criteria.
Deviation factor (D4): Compares actual route distance to straight-line distance between origin and destination; high deviation typically signals a severance point such as a river, railway, or major road with no safe crossing.
Gradient (D8): Calculated from OS NGD elevation data, measuring the gradient experienced in each direction of travel along every link, assessed against LTN 1/20 Table 5-8 maximum continuous climb lengths by gradient %.
Unlike other dimensions, directness is a property of the whole route geometry, not a link-level average.
Weight: 3/25 of overall CLoS
Proxy for the LTN 1/20 network density criterion (mesh width), using 1 of 3 cohesion criteria.
Network density (C3): Scored by proximity to the nearest protected cycling facility — provision physically separated from motor traffic by a kerb, step, or barrier (fully kerbed cycle tracks, stepped cycle tracks, and light segregation). Within 100 m scores green, 100–500 m amber, beyond 500 m red.
The route score is a length-weighted average across all links.
This tool evaluates cycling routes in the West Midlands against the UK's LTN 1/20 Cycling Level of Service framework. It scores routes across five quality dimensions: safety, attractiveness, comfort, directness, and coherence.
Click anywhere on the map to place your origin point (green), then click again to set the destination (red). The tool uses Dijkstra's algorithm to find the shortest path between them, then scores every link along that route against LTN 1/20 criteria.
After assessment, each link along the route is coloured by its individual CLoS score (red = poor, amber = moderate, green = good). The score card shows the route-level overall CLoS percentage — a length-weighted average — and a breakdown across all five LTN 1/20 dimensions. Tap the ⓘ icon next to each dimension to learn how it's calculated.
Use the display controls to colour the network by different metrics — overall CLoS, safety, attractiveness, junction assessment, or facility type. Toggle between forward and backward directions to see how scores differ by travel direction. Click any link on the map to inspect its properties.