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Donnelly Mill Road

WAUnclassified road19.0 km46 segments
2.4Sports
19.0 kmTotal length
46Segments
47Grey spot segments
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Donnelly Mill Road is a 19 km sealed road in Western Australia, Australia. It scores 6.5/10 for 4WDs with gently winding corners and fair surface.

Explore more roads near Bunbury16 km

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Vehicle scores
2.4/10
SPTSportsSealed roads, curviness, mountain passes
6.0/10
MOTMotoTight bends, switchbacks, technical roads
4.0/10
EVEVSmooth surface, sealed roads, range-friendly
6.5/10
4WD4WDGravel access, off-road suitability
2.6/10
VANCaravanSmooth sealed, gentle grades, no steep passes
Segment quality distribution
Sports score - 46 segments
Fair (4-6)43%Poor (<4)57%

Sports score IQR: 2.4 - 4.4

Surface
Surface coverage
Sealed48%Unsealed52%
Score breakdown
Median component scores across all segments
Surface
5.0
Median surface quality. Smooth sealed asphalt scores 10. Chipseal 8. Gravel 5.
Curviness
5.5
Median curviness. Higher scores mean more bends per kilometre.
Speed
4.0
Speed limit suitability. Sweet spot is 60-110 km/h.
Road classUnclassified road
8.0
Road classification. Motorways score zero. Tertiary roads score 9.
Traffic
9.0
Estimated traffic density. Lower traffic = higher score.
Elevation
7.0
Elevation change per kilometre. More climbing = higher score.
Crash history
Aggregated across all 46 segments
47
Grey spots

Crash record linkage not yet available for WA. Grey spots are segments where curvature geometry mismatches the posted speed limit - these are flagged regardless of crash history.

Road environment
Geometry and climate-derived risk indicators
6.8/10 safety score - higher is safer
Wet road exposure54%
Night driving risk59%
Wind exposure60%
Sun glare risk91%
Wildlife strike risk12%

Risk values derived from road geometry, orientation, weather station data, and satellite canopy cover. 0 = minimal risk, 1 = maximum risk.

Segments
Top 47 segments by sports score
IDSurfaceLengthSportsMotoEV
#99264629Asphalt0.43 km5.48.29.1#99268129Asphalt0.48 km5.17.88.6#99268131Asphalt0.50 km5.07.78.5#99264627Asphalt0.36 km5.07.78.5#99264628Asphalt0.45 km4.97.58.4#99264626Asphalt0.47 km4.97.48.2#99264625Asphalt0.40 km4.87.48.2#99268130Asphalt0.65 km4.87.38.2#99264630Asphalt0.64 km4.87.38.2#99268124Asphalt0.50 km4.77.18.1#99268127Asphalt0.50 km4.56.87.8#99268123Asphalt0.45 km4.46.67.7#99268132Asphalt0.35 km4.36.47.3#99268125Asphalt0.50 km4.36.47.3#99268122Asphalt0.37 km4.26.27.6#99264624Asphalt0.41 km4.16.17.3#99264623Asphalt0.38 km4.16.17.2#116332889Asphalt0.27 km4.06.07.2#99268126Asphalt0.65 km4.05.97.1#99268133Asphalt0.04 km4.05.97.1#99268128Asphalt0.38 km3.85.56.4#99264652Gravel0.25 km2.46.04.0#99264653Gravel0.38 km2.46.04.0#116332914Gravel0.11 km2.44.14.0#99264638Gravel0.41 km2.45.44.0#99360665Gravel0.23 km2.46.04.0#99264644Gravel0.49 km2.45.54.0#99360663Gravel0.04 km2.44.14.0#99360664Gravel0.15 km2.46.04.0#99264637Gravel0.31 km2.46.04.0#99264654Gravel0.59 km2.46.04.0#99264636Gravel0.45 km2.45.34.0#99264635Gravel0.65 km2.45.74.0#99264640Gravel0.38 km2.46.04.0#99264641Gravel0.40 km2.45.64.0#99264642Gravel0.44 km2.46.04.0#99264643Gravel0.43 km2.44.44.0#99264646Gravel0.13 km2.44.84.0#99264647Gravel0.42 km2.46.04.0#99264649Gravel0.45 km2.46.04.0#99264634Gravel0.48 km2.45.54.0#99264639Gravel0.28 km2.46.04.0#99264633Gravel0.50 km2.45.84.0#99264645Gravel0.54 km2.46.04.0#99264648Gravel0.55 km2.45.84.0#99264650Gravel0.35 km2.45.84.0#99264651Gravel0.47 km2.46.04.0
API reference
Road aggregate data via the Contour API
GET/api/v1/roads/donnelly-mill-road-waRoad aggregate - scores, stats, risk profile, activity, segment list
GET/api/v1/roads/search?q=Donnelly%20Mill%20Road&state=WASearch roads by name

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.

Enquire about council data access →
Frequently asked questions
How long is Donnelly Mill Road?+

Donnelly Mill Road is approximately 19 km long. At typical touring speeds, expect around 1 hour of driving end to end, excluding stops.

Is Donnelly Mill Road sealed?+

Yes. Donnelly Mill Road is fully sealed for its entire length.

Is Donnelly Mill Road good for motorcycles?+

It is passable. Donnelly Mill Road scores 6.0/10 for motorcycles. Consider it a connector rather than a destination ride.

Can I drive Donnelly Mill Road in a caravan?+

Not recommended. Donnelly Mill Road scores 2.6/10 for caravans due to geometry, surface or gradient. Consider an alternative route if towing.

Are there any dangerous sections on Donnelly Mill Road?+

Contour has identified 47 grey spots on Donnelly Mill Road - sections where the road geometry does not match the posted speed limit. Take extra care in wet or low-visibility conditions.

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Road data last updated: 22 April 2026. Scores are based on road geometry, surface, and traffic data. Always drive to conditions and follow local road rules.

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