Nanson Howatharra Road

WATertiary road14.9 km33 segments

4.8Sports

14.9 kmTotal length

33Segments

33Grey spot segments

Nanson Howatharra Road is a 15 km sealed tertiary route in Western Australia, Australia. It scores 8.1/10 for EVs with gently winding corners and excellent surface. It also rates well for motorcycles.

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Vehicle scores

4.8/10

SPTSportsSealed roads, curviness, mountain passes

7.2/10

MOTMotoTight bends, switchbacks, technical roads

8.1/10

EVEVSmooth surface, sealed roads, range-friendly

6.9/10

4WD4WDGravel access, off-road suitability

5.5/10

VANCaravanSmooth sealed, gentle grades, no steep passes

Segment quality distribution

Sports score - 33 segments

Fair (4-6)91%Poor (<4)9%

Sports score IQR: 4.1 - 5.2

Surface

Surface coverage

Sealed100%

Score breakdown

Median component scores across all segments

Surface

10.0

Median surface quality. Smooth sealed asphalt scores 10. Chipseal 8. Gravel 5.

Curviness

5.0

Median curviness. Higher scores mean more bends per kilometre.

Speed

10.0

Speed limit suitability. Sweet spot is 60-110 km/h.

Road classTertiary road

9.0

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 33 segments· 5 years of data

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.

When is this road risky?

Crash conditions - share of recorded crashes by circumstance

Wet road crashes

Crashes that occurred in wet conditions

Night crashes

Crashes that occurred after dark

Based on 5 years of crash records linked to road geometry. Crash breakdown (night, wet, weekends): VIC data 2012-2024. Other states show aggregate counts only.

Road environment

Geometry and climate-derived risk indicators

6.7/10 safety score - higher is safer

Wet road exposure48%

Night driving risk60%

Wind exposure58%

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 33 segments by sports score

IDSurfaceLengthSportsMotoEV

#99053853Asphalt0.50 km5.48.39.1 #99053869Asphalt0.50 km5.48.28.9 #99053867Asphalt0.65 km5.48.28.9 #99053865Asphalt0.65 km5.48.28.9 #99053864Asphalt0.50 km5.48.28.9 #99053860Asphalt0.65 km5.38.18.8 #99053844Asphalt0.53 km5.28.08.7 #99053863Asphalt0.50 km5.28.08.7 #99053862Asphalt0.50 km5.27.98.6 #99053859Asphalt0.65 km5.27.98.6 #99053868Asphalt0.30 km5.17.88.4 #99053866Asphalt0.65 km5.07.78.5 #99053838Asphalt0.41 km5.07.78.3 #99053856Asphalt0.43 km5.07.58.3 #99053842Asphalt0.38 km4.97.58.3 #99053843Asphalt0.39 km4.87.28.0 #99053848Asphalt0.28 km4.87.28.1 #99053845Asphalt0.65 km4.87.28.1 #99053851Asphalt0.57 km4.87.28.1 #99053855Asphalt0.50 km4.87.28.1 #99053847Asphalt0.51 km4.77.07.8 #99053839Asphalt0.65 km4.56.77.5 #99053849Asphalt0.50 km4.26.27.4 #99053854Asphalt0.32 km4.16.17.4 #99053857Asphalt0.03 km4.16.17.4 #99053846Asphalt0.01 km4.05.97.1 #99053858Asphalt0.50 km4.05.97.1 #99053861Asphalt0.50 km4.05.97.1 #99053852Asphalt0.26 km4.05.97.1 #99053850Asphalt0.50 km4.05.97.1 #99053840Asphalt0.39 km3.95.66.7 #99053870Asphalt0.05 km3.95.66.7 #99053841Asphalt0.49 km3.85.56.4

API reference

Road aggregate data via the Contour API

GET/api/v1/roads/nanson-howatharra-road-waRoad aggregate - scores, stats, risk profile, activity, segment list

GET/api/v1/roads/search?q=Nanson%20Howatharra%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 Nanson Howatharra Road?+

Nanson Howatharra Road is approximately 15 km long. At typical touring speeds, expect around 1 hour of driving end to end, excluding stops.

Is Nanson Howatharra Road sealed?+

Yes. Nanson Howatharra Road is fully sealed for its entire length.

Is Nanson Howatharra Road good for motorcycles?+

It rates well. Nanson Howatharra Road scores 7.2/10 for motorcycles, with enough character to be worth the trip for most riders.

Can I drive Nanson Howatharra Road in a caravan?+

With care. Nanson Howatharra Road scores 5.5/10 for caravans. Some sections may be tight or rough for a heavy tow.

Is Nanson Howatharra Road good for an EV?+

Yes. Nanson Howatharra Road scores 8.1/10 for EVs. Regenerative braking on any elevation changes and smooth throttle control on the corners will both feel at home here.

Are there any dangerous sections on Nanson Howatharra Road?+

Contour has identified 33 grey spots on Nanson Howatharra 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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