Harper Road

SATertiary road2.2 km6 segments

6.7Sports

2.2 kmTotal length

6Segments

6Grey spot segments

Harper Road is a 2 km sealed tertiary route in South Australia, Australia. It scores 8.1/10 for caravans with straight corners and excellent surface. It also rates well for EVs.

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Vehicle scores

6.7/10

SPTSportsSealed roads, curviness, mountain passes

6.4/10

MOTMotoTight bends, switchbacks, technical roads

7.1/10

EVEVSmooth surface, sealed roads, range-friendly

5.6/10

4WD4WDGravel access, off-road suitability

8.1/10

VANCaravanSmooth sealed, gentle grades, no steep passes

Segment quality distribution

Sports score - 6 segments

Excellent (8+)17%Good (6-8)83%

Sports score IQR: 6.7 - 6.8

Surface

Surface coverage

Sealed44%Unsealed56%

Score breakdown

Median component scores across all segments

Surface

10.0

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

Curviness

0.0

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 6 segments· 10 years of data

Grey spots

Crash record linkage not yet available for SA. 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 10 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

7.1/10 safety score - higher is safer

Wet road exposure48%

Night driving risk57%

Wind exposure62%

Sun glare risk51%

Wildlife strike risk11%

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

Segments

Top 13 segments by sports score

IDSurfaceLengthSportsMotoEV

#104475510Asphalt0.47 km9.39.29.3 #104475511Asphalt0.49 km6.86.57.2 #104475513Asphalt0.50 km6.76.47.1 #104475514Asphalt0.18 km6.76.47.1 #104475515Asphalt0.43 km6.76.47.1 #104475512Asphalt0.09 km6.56.16.7 #104438745-0.50 km4.26.47.0 #104438746-0.50 km4.26.47.0 #104438747-0.50 km4.26.47.0 #104466647-0.30 km4.26.47.0 #104466648-0.11 km3.14.85.5 #104438749-0.35 km2.94.65.3 #104438748-0.50 km2.94.65.3

API reference

Road aggregate data via the Contour API

GET/api/v1/roads/harper-road-sa-2Road aggregate - scores, stats, risk profile, activity, segment list

GET/api/v1/roads/search?q=Harper%20Road&state=SASearch roads by name

Councils & Government

This road is part of SA'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 Harper Road?+

Harper Road is approximately 2 km long. At typical touring speeds, expect around 1 hour of driving end to end, excluding stops.

Is Harper Road sealed?+

Yes. Harper Road is fully sealed for its entire length.

Is Harper Road good for motorcycles?+

It rates well. Harper Road scores 6.4/10 for motorcycles, with enough character to be worth the trip for most riders.

Can I drive Harper Road in a caravan?+

Yes. Harper Road scores 8.1/10 for caravans, making it a reasonable choice for towing. Watch for changes in surface and any steep gradients.

Is Harper Road good for an EV?+

Yes. Harper Road scores 7.1/10 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 Harper Road?+

Contour has identified 6 grey spots on Harper Road - sections where the road geometry does not match the posted speed limit. Take extra care in wet or low-visibility conditions.

Similar roads

Esplanade

Same surface, 130 km away

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Emu Bay Road

Same state, 138 km away

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Murrayview Road

Same state, 142 km away

8.0

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Dowling Drive

Same state, 168 km away

7.9

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Miller Crescent

Same surface, 182 km away

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Road data last updated: 23 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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