Southern Expressway

SAMotorway20.1 km54 segmentsM2

5.9Sports

20.1 kmTotal length

54Segments

705Recorded crashes

21Grey spot segments

Southern Expressway is a 20 km sealed motorway in South Australia, Australia. It scores 6.4/10 for caravans with straight corners and excellent surface.

Explore more roads near Adelaide30 km

7-day forecast

Write a story··Report an issue

Vehicle scores

5.9/10

SPTSportsSealed roads, curviness, mountain passes

5.5/10

MOTMotoTight bends, switchbacks, technical roads

6.1/10

EVEVSmooth surface, sealed roads, range-friendly

4.3/10

4WD4WDGravel access, off-road suitability

6.4/10

VANCaravanSmooth sealed, gentle grades, no steep passes

Segment quality distribution

Sports score - 54 segments

Excellent (8+)4%Good (6-8)42%Fair (4-6)54%

Sports score IQR: 5.2 - 6.7

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

3.2

Median curviness. Higher scores mean more bends per kilometre.

Speed

10.0

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

Road classMotorway

0.0

Road classification. Motorways score zero. Tertiary roads score 9.

Traffic

2.5

Estimated traffic density. Lower traffic = higher score.

Elevation

7.0

Elevation change per kilometre. More climbing = higher score.

Crash history

Aggregated across all 54 segments· 10 years of data

705

Total crashes

Fatalities

Serious injuries

Grey spots

Source: State crash data linked to road geometry. Grey spots are segments where curvature geometry mismatches the posted speed limit.

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.

Traffic volume

Annual average daily traffic

40,700vehicles per day (median)

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

Segments

Top 142 segments by sports score

IDSurfaceLengthSportsMotoEV

#104598079Asphalt0.50 km8.38.18.3 #104063438Asphalt0.50 km8.38.18.3 #104063437Asphalt0.50 km8.38.18.3 #104598080Asphalt0.50 km8.38.18.3 #104365349Asphalt0.50 km8.28.18.3 #104536222Asphalt0.50 km8.17.88.1 #104711520Asphalt0.50 km7.87.67.8 #104365345Asphalt0.50 km7.87.58.0 #104598078Asphalt0.50 km7.77.47.9 #104536220Asphalt0.50 km7.77.67.7 #104365347Asphalt0.50 km7.57.27.5 #104737531Asphalt0.45 km7.57.27.5 #104536221Asphalt0.50 km7.47.17.4 #104365352Asphalt0.50 km7.47.37.3 #104063436Asphalt0.50 km7.47.17.4 #104736013Asphalt0.50 km7.27.07.3 #104365309Asphalt0.50 km7.26.97.3 #104365358Asphalt0.50 km7.17.07.3 #104737539Asphalt0.44 km7.16.87.2 #104816866Asphalt0.41 km7.16.87.2 #104598075Asphalt0.47 km7.06.77.1 #104365320Asphalt0.29 km7.06.77.1 #104365398Asphalt0.50 km7.06.67.1 #104737537Asphalt0.50 km6.96.67.0 #104365342Asphalt0.50 km6.76.46.9 #104737533Asphalt0.50 km6.76.46.9 #104063449Asphalt0.37 km6.76.46.7 #104063441Asphalt0.50 km6.76.36.6 #104327111Asphalt0.25 km6.76.46.9 #104227633Asphalt0.26 km6.76.36.8 #104598072Asphalt0.50 km6.76.37.0 #104883291Asphalt0.40 km6.76.46.7 #104883294Asphalt0.50 km6.76.36.6 #104883298Asphalt0.50 km6.76.36.6 #104063446Asphalt0.50 km6.66.36.8 #104365350Asphalt0.36 km6.66.36.8 #104063532Asphalt0.47 km6.66.26.8 #104063536Asphalt0.50 km6.66.26.8 #104883286Asphalt0.43 km6.66.36.6 #104810956Asphalt0.50 km6.66.26.7 #104810958Asphalt0.50 km6.56.26.9 #104365401Asphalt0.47 km6.56.26.8 #104365311Asphalt0.50 km6.56.26.7 #104063447Asphalt0.50 km6.46.06.6 #104365313Asphalt0.50 km6.46.16.4 #104365399Asphalt0.50 km6.46.06.4 #104365360Asphalt0.50 km6.46.06.4 #104598074Asphalt0.50 km6.46.06.4 #104365317Asphalt0.50 km6.46.06.6 #104569417Asphalt0.50 km6.35.96.3 #104883309Asphalt0.50 km6.35.96.5 #104810951Asphalt0.50 km6.35.96.3 #104063531Asphalt0.50 km6.25.86.4 #104063535Asphalt0.50 km6.25.86.4 #104737540Asphalt0.21 km6.15.86.4 #104063439Asphalt0.50 km6.15.76.5 #104227635Asphalt0.23 km6.15.86.4 #104536223Asphalt0.28 km6.05.76.5 #104365343Asphalt0.50 km6.05.66.3 #104816874Asphalt0.22 km6.05.76.3 #104598076Asphalt0.50 km6.05.66.1 #104883304Asphalt0.10 km6.05.86.4 #104745358Asphalt0.24 km6.05.76.3 #104365315Asphalt0.50 km6.05.66.0 #104883308Asphalt0.50 km5.95.56.0 #104598081Asphalt0.21 km5.95.56.3 #104063448Asphalt0.32 km5.85.46.1 #104811208Asphalt0.07 km5.85.46.0 #104536219Asphalt0.14 km5.85.56.2 #104569418Asphalt0.50 km5.75.36.1 #104063443Asphalt0.34 km5.75.36.1 #104883299Asphalt0.20 km5.75.46.1 #104810949Asphalt0.50 km5.75.25.8 #104883290Asphalt0.15 km5.75.35.9 #104870498Asphalt0.16 km5.75.26.0 #104784812Asphalt0.37 km5.65.25.8 #104883305Asphalt0.24 km5.65.25.8 #104883297Asphalt0.16 km5.65.25.8 #104745357Paved0.16 km5.55.15.7 #104227634Asphalt0.06 km5.55.16.1 #104883311Asphalt0.11 km5.55.25.8 #104365356Asphalt0.08 km5.55.25.8 #104536224Asphalt0.14 km5.55.05.9 #104365402Asphalt0.28 km5.55.05.8 #104784814Asphalt0.20 km5.45.05.6 #104365341Asphalt0.07 km5.45.15.9 #104063450Asphalt0.06 km5.45.15.9 #104852895Paved0.04 km5.45.06.0 #104327110Paved0.03 km5.45.06.0 #104883295Asphalt0.17 km5.45.05.6 #104883306Asphalt0.47 km5.45.05.8 #104365319Asphalt0.16 km5.45.05.8 #104063538Asphalt0.06 km5.44.95.6 #104063537Asphalt0.27 km5.44.95.5 #104063444Asphalt0.10 km5.34.95.7 #104883307Asphalt0.50 km5.34.95.8 #104810953Asphalt0.15 km5.34.85.7 #104810955Asphalt0.01 km5.34.85.9 #104810962Asphalt0.01 km5.34.85.9 #104569420Asphalt0.06 km5.34.85.9 #104737534Asphalt0.06 km5.34.85.8 #104536225Asphalt0.03 km5.24.85.7 #104736014Asphalt0.02 km5.24.85.7 #104883310Asphalt0.09 km5.24.85.7 #104810960Asphalt0.16 km5.24.85.8 #104883293Asphalt0.12 km5.24.75.6 #104063533Asphalt0.05 km5.24.75.8 #104365340Asphalt0.05 km5.24.75.8 #104063534Asphalt0.08 km5.24.75.8 #104063445Asphalt0.17 km5.24.75.8 #104883313Asphalt0.07 km5.24.85.4 #104598077Asphalt0.50 km5.24.75.6 #104598082Asphalt0.09 km5.24.85.5 #104365400Asphalt0.50 km5.24.75.6 #104365361Asphalt0.12 km5.14.75.6 #104883285Asphalt0.13 km5.14.75.4 #104598073Asphalt0.50 km5.14.65.5 #104883296Asphalt0.23 km5.14.65.3 #104824717Asphalt0.15 km5.14.75.5 #104729101Paved0.16 km5.04.65.3 #104063440Asphalt0.50 km5.04.55.5 #104737536Asphalt0.04 km5.04.55.5 #104729102Paved0.12 km5.04.55.3 #104365344Asphalt0.14 km5.04.55.3 #104365403Asphalt0.06 km4.94.55.4 #104063442Asphalt0.04 km4.84.35.1 #104598071Asphalt0.37 km4.84.35.1 #104737535Asphalt0.11 km4.84.35.1 #104711521Asphalt0.06 km4.84.35.1 #104883284Asphalt0.15 km4.84.35.1 #104852893Asphalt0.04 km4.84.35.1 #104737532Asphalt0.18 km4.84.35.1 #104824718Asphalt0.07 km4.74.35.4 #104737541Asphalt0.14 km4.74.35.3 #104737538Asphalt0.12 km4.74.14.8 #104816872Asphalt0.07 km4.74.25.3 #104365363Asphalt0.17 km4.64.14.8 #104569419Asphalt0.00 km4.64.14.8 #104816869Asphalt0.03 km4.64.14.8 #104816868Asphalt0.03 km4.64.14.8 #104816873Asphalt0.05 km4.54.05.0 #104816875Asphalt0.07 km4.23.84.6

API reference

Road aggregate data via the Contour API

GET/api/v1/roads/southern-expressway-saRoad aggregate - scores, stats, risk profile, activity, segment list

GET/api/v1/roads/search?q=Southern%20Expressway&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 Southern Expressway?+

Southern Expressway is approximately 20 km long. At typical touring speeds, expect around 1 hour of driving end to end, excluding stops.

Is Southern Expressway sealed?+

Yes. Southern Expressway is fully sealed for its entire length.

Is Southern Expressway good for motorcycles?+

It is passable. Southern Expressway scores 5.5/10 for motorcycles. Consider it a connector rather than a destination ride.

Can I drive Southern Expressway in a caravan?+

Yes. Southern Expressway scores 6.4/10 for caravans, making it a reasonable choice for towing. Watch for changes in surface and any steep gradients.

Is Southern Expressway good for an EV?+

Yes. Southern Expressway scores 6.1/10 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 Southern Expressway?+

Contour has identified 21 grey spots on Southern Expressway - sections where the road geometry does not match the posted speed limit. Take extra care in wet or low-visibility conditions.

Similar roads

Grahn Road

Same state, 88 km away

7.4

RQS

Luard Street

Same state, 54 km away

7.3

RQS

Mintaro Road

Same state, 126 km away

7.3

RQS

Warren Road

Same state, 53 km away

7.3

RQS

Terlinga Road

Same state, 51 km away

7.3

RQS

Road data last updated: 16 April 2026. Scores are based on road geometry, surface, and traffic data. Always drive to conditions and follow local road rules.

See how the world's best roads compare