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Old Norton Summit Road

SASecondary road5.2 km19 segmentsB27
8.1Sports
6.4Safety
5.2 kmTotal length
19Segments
10Grey spot segments
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Old Norton Summit Road is a 5.2 km sealed secondary route in South Australia, Australia. It scores 8.3/10 for EVs with flowing corners and excellent surface. It also rates well for sports cars and motorcycles and 4WDs and caravans.

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Vehicle scores
8.1/10
SPTSportsSealed roads, curviness, mountain passes
8.0/10
MOTMotoTight bends, switchbacks, technical roads
8.3/10
EVEVSmooth surface, sealed roads, range-friendly
7.2/10
4WD4WDGravel access, off-road suitability
7.1/10
VANCaravanSmooth sealed, gentle grades, no steep passes
Segment quality distribution
Sports score - 19 segments
Excellent (8+)52%Good (6-8)17%Fair (4-6)30%

Sports score IQR: 6.0 - 8.9

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
7.0
Median curviness. Higher scores mean more bends per kilometre.
Speed
7.0
Speed limit suitability. Sweet spot is 60-110 km/h.
Road classSecondary road
8.0
Road classification. Motorways score zero. Tertiary roads score 9.
Traffic
8.0
Estimated traffic density. Lower traffic = higher score.
Elevation
9.0
Elevation change per kilometre. More climbing = higher score.
Road intel
Grey spots10 of 19 segments
Segments where curvature is tighter than the posted speed limit. Geometry alone flags these as higher risk, no crash history required.
Wet riskModerate
Average wet sensitivity across segments, based on surface, drainage, gradient and local rainfall.
Night riskPresent
Visibility at night across the road, weighted by lighting, tree canopy density and curves.
Wind exposureHigh
Average wind exposure across segments, based on measured wind speed, terrain and shelter. Relevant for motorcycles and caravans.
Sun glarePresent
East-west segments exposed to sunrise and sunset glare, adjusted for tree cover.
Crash history
Aggregated across all 19 segments
10
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.

Traffic volume
Annual average daily traffic
3,200vehicles per day (median)

Coverage: 100% of segments have AADT data. Based on traffic count surveys - actual volumes vary by season.

Road environment
Geometry and climate-derived risk indicators
Wet road exposure49%
Night driving risk64%
Wind exposure60%
Sun glare risk81%
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 23 segments by sports score
IDSurfaceLengthSportsMotoEV
#147321633Asphalt0.35 km9.08.99.0#146994480Asphalt0.50 km9.08.99.0#147321632Asphalt0.50 km9.08.99.0#146994482Asphalt0.50 km8.98.98.9#147321630Asphalt0.50 km8.98.98.9#147347752Asphalt0.43 km8.98.98.9#147321932Asphalt0.50 km8.98.98.9#146994481Asphalt0.50 km8.98.98.9#146994483Asphalt0.37 km8.98.98.9#146972737Asphalt0.35 km8.58.58.6#146994484Asphalt0.12 km8.58.48.7#147321631Asphalt0.12 km8.18.08.3#146972738Asphalt0.14 km6.66.47.1#147321634Asphalt0.01 km6.36.06.9#146972739Asphalt0.06 km6.36.06.8#146972734Asphalt0.02 km6.15.86.7#147366329Asphalt0.07 km6.05.76.6#146972736Asphalt0.10 km5.95.76.4#147366331Asphalt0.02 km5.85.56.3#147366330Asphalt0.11 km5.85.56.3#146972735Asphalt0.12 km5.85.56.3#147321934Asphalt0.01 km5.55.25.7#147321933Asphalt0.00 km5.55.25.7
API reference
Road aggregate data via the Contour API
GET/api/v1/roads/old-norton-summit-road-saRoad aggregate - scores, stats, risk profile, activity, segment list
GET/api/v1/roads/search?q=Old%20Norton%20Summit%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 Old Norton Summit Road?+

Old Norton Summit Road is approximately 5.2 km long. At typical touring speeds, expect a few minutes of driving end to end, excluding stops.

Is Old Norton Summit Road sealed?+

Yes. Old Norton Summit Road is fully sealed for its entire length.

Is Old Norton Summit Road good for motorcycles?+

Yes. Old Norton Summit Road scores 8.0/10 for motorcycles, placing it among the stronger rides in the region. Corners, surface and elevation all contribute to the rating.

Can I drive Old Norton Summit Road in a caravan?+

Yes. Old Norton Summit Road scores 7.1/10 for caravans, making it a reasonable choice for towing. Watch for changes in surface and any steep gradients.

Is Old Norton Summit Road good for an EV?+

Yes. Old Norton Summit Road scores 8.3/10 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 Old Norton Summit Road?+

Contour has identified 10 grey spots on Old Norton Summit Road - sections where the road geometry does not match the posted speed limit. Take extra care in wet or low-visibility conditions.

Road data last updated: 11 May 2026. Scores are based on road geometry, surface, and traffic data. Always drive to conditions and follow local road rules.