Frog Rock - Marvel Loch Road

WAUnclassified roadUnpaved0.40 km#99225225

2.4RQS

0°/kmCurviness

18.3 m/kmElevation change

3 / 6Risk factors

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Map showing location of Frog Rock - Marvel Loch Road

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Vehicle scores

2.4/10

SPTSportsSealed roads, curviness, open mountain passes

4.5/10

MOTMotoTight bends, switchbacks, technical mountain roads

4.0/10

EVEVSmooth surface, sealed roads, range-friendly routing

5.6/10

4WD4WDGravel tracks, off-road access, recovery risk ratings

2.6/10

VANCaravanSmooth sealed roads, gentle grades, no steep passes

How the score is built

Algorithm factors

SurfaceUnpaved

3.0

Smooth sealed asphalt scores 10. Chipseal 8. Gravel 5. Dirt 2.

Curviness0°/km

0.0

Long straights with few corners

Speed100 km/h

10.0

Sweet spot is 60–110 km/h. Below 40 is suburban crawl. Above 110 is freeway.

Road classUnclassified road

8.0

Motorways score zero. Tertiary roads score 9.

TrafficUnclassified road

9.0

Very few other vehicles

Elevation18.3 m/km

4.0

Moderate hills

Safety score

6.9/10 — higher is safer

Composite of wet, night, spot risk, fauna, flood, glare and wind factors.

Road intel

Wet riskElevated

Wet sensitivity based on surface, drainage, gradient, and local rainfall. Higher scores in high-rainfall regions.

Night riskPresent

Road visibility at night based on street lighting, tree canopy density, and curves.

Wind exposure– m/s

Wind exposure based on measured wind speed, terrain, and shelter. Relevant for motorcycles and caravans.

Sun glarePresent

East-west roads exposed to sunrise and sunset glare, adjusted for tree cover.

Risk factors3 of 6

Tight curvature, speed-curve mismatch, steep grade, low-friction surface, low-standard road, or high-speed unsealed — each adds one factor.

Community

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API reference

This data is available via the Contour API

GET/api/segments/99225225?type=roadPublic — scores, geometry, community data

GET/api/v1/segments/99225225?type=roadAuthenticated — full data including crash block

GET/api/segments/nearby?lat=-31.485&lng=119.121&radius_m=5000Find segments near a coordinate

Segment ID: 99225225 · State: WA · Sources: OpenStreetMap, TAC CrashStats, SILO, BOM, Global Wind Atlas, Copernicus

Councils & Government

This road is part of WA's road network. Contour scores every road in Australia for surface condition, curviness, grey spot classification, and 4WD track passability. If your organisation manages this road or promotes tourism in the region, this data is available via API.

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Contour road scores are based on road geometry, surface quality, and traffic data. They are a guide only. Always drive to conditions, follow local road rules, and exercise your own judgement. Do not use Contour while driving.