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Dukes Highway

SATrunk road182.0 km481 segmentsA8
5.7Sports
182.0 kmTotal length
481Segments
525Grey spot segments
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Dukes Highway is a 182 km sealed trunk route in South Australia, Australia. It scores 6.8/10 for caravans with straight corners and excellent surface.

Explore more roads near Mount Gambier28 km

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Vehicle scores
5.7/10
SPTSportsSealed roads, curviness, mountain passes
5.5/10
MOTMotoTight bends, switchbacks, technical roads
6.0/10
EVEVSmooth surface, sealed roads, range-friendly
4.4/10
4WD4WDGravel access, off-road suitability
6.8/10
VANCaravanSmooth sealed, gentle grades, no steep passes
Segment quality distribution
Sports score - 481 segments
Excellent (8+)1%Good (6-8)31%Fair (4-6)64%Poor (<4)4%

Sports score IQR: 5.6 - 6.2

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
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 classTrunk road
3.0
Road classification. Motorways score zero. Tertiary roads score 9.
Traffic
8.0
Estimated traffic density. Lower traffic = higher score.
Elevation
2.0
Elevation change per kilometre. More climbing = higher score.
Crash history
Aggregated across all 481 segments· 10 years of data
525
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

0%

Night crashes

Crashes that occurred after dark

0%

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
4,000vehicles 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
7.9/10 safety score - higher is safer
Wet road exposure36%
Night driving risk30%
Wind exposure39%
Sun glare risk77%
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 500 segments by sports score
IDSurfaceLengthSportsMotoEV
#103966827Asphalt0.50 km8.48.38.3#104523820Asphalt0.50 km8.28.18.2#104222627Asphalt0.50 km8.28.18.1#104523836Asphalt0.35 km8.18.08.1#104523798Asphalt0.50 km8.18.07.9#104523835Asphalt0.50 km8.18.07.9#104523800Asphalt0.50 km7.97.87.8#104523943Asphalt0.50 km7.97.77.7#109442964Asphalt0.36 km7.97.77.9#104523779Asphalt0.50 km7.87.67.6#104523797Asphalt0.50 km7.87.67.6#104523834Asphalt0.50 km7.77.67.6#104628918Asphalt0.50 km7.77.57.8#104523899Asphalt0.50 km7.67.57.5#104523780Asphalt0.50 km7.57.47.5#104523799Asphalt0.50 km7.57.47.5#104222625Asphalt0.44 km7.57.37.6#104222623Asphalt0.44 km7.57.37.4#109442959Asphalt0.38 km7.57.37.4#104523946Asphalt0.50 km7.57.37.2#104740435Asphalt0.35 km7.57.37.6#109442960Asphalt0.41 km7.47.27.3#104545399Asphalt0.31 km7.47.27.5#104523926Asphalt0.34 km7.47.27.3#104628910Asphalt0.50 km7.47.27.3#104545396Asphalt0.52 km7.47.27.5#104628929Asphalt0.50 km7.47.27.3#109442963Asphalt0.45 km7.47.27.3#104523848Asphalt0.50 km7.47.27.2#104523823Asphalt0.50 km7.37.17.3#104523923Asphalt0.43 km7.37.17.3#104130081Asphalt0.48 km7.37.27.3#104628921Asphalt0.50 km7.37.17.3#104523945Asphalt0.50 km7.37.17.1#104545388Asphalt0.50 km7.37.17.2#104524978Asphalt0.50 km7.37.07.2#104443766Asphalt0.47 km7.37.07.2#104523931Asphalt0.50 km7.27.07.2#104523831Asphalt0.50 km7.27.07.2#104524976Asphalt0.50 km7.27.07.0#104523849Asphalt0.50 km7.27.07.2#104443764Asphalt0.50 km7.27.07.2#104523920Asphalt0.50 km7.27.07.2#104443765Asphalt0.50 km7.27.07.2#104523847Asphalt0.31 km7.27.07.0#104523860Asphalt0.50 km7.27.07.2#104523910Asphalt0.50 km7.16.97.0#104524961Asphalt0.50 km7.16.97.0#104525019Asphalt0.18 km7.16.87.1#104443763Asphalt0.50 km7.06.87.0#104443748Asphalt0.50 km7.06.87.0#104523856Asphalt0.50 km7.06.86.9#104523939Asphalt0.50 km7.06.86.9#104729339Asphalt0.19 km7.06.87.0#104628896Asphalt0.50 km7.06.87.0#104443747Asphalt0.50 km7.06.87.0#104545493Asphalt0.29 km7.06.87.2#104525018Asphalt0.16 km6.96.77.0#104545492Asphalt0.35 km6.96.77.2#104523889Asphalt0.50 km6.96.77.0#104523932Asphalt0.50 km6.86.66.9#104523888Asphalt0.50 km6.86.66.9#104523948Asphalt0.50 km6.86.66.7#104523830Asphalt0.50 km6.86.66.9#104443786Asphalt0.50 km6.86.66.9#104545395Asphalt0.42 km6.86.66.7#104628893Asphalt0.19 km6.86.66.8#104524968Asphalt0.50 km6.86.56.8#104523942Asphalt0.50 km6.86.56.7#104628920Asphalt0.50 km6.86.56.8#104524975Asphalt0.50 km6.86.56.8#104523821Asphalt0.50 km6.86.56.8#104523826Asphalt0.50 km6.76.56.8#104523917Asphalt0.50 km6.76.56.7#104523951Asphalt0.50 km6.76.66.5#104523861Asphalt0.50 km6.76.56.8#104545490Asphalt0.45 km6.76.56.8#104628930Asphalt0.24 km6.76.47.0#104724000Asphalt0.23 km6.76.47.0#104628914Asphalt0.50 km6.66.46.9#104523944Asphalt0.50 km6.66.46.6#104545384Asphalt0.46 km6.66.36.7#104545488Asphalt0.50 km6.66.36.7#104523825Asphalt0.42 km6.66.36.7#104523911Asphalt0.50 km6.66.56.4#104545383Asphalt0.36 km6.66.36.7#104523922Asphalt0.50 km6.66.36.7#104523924Asphalt0.50 km6.66.36.7#104525004Asphalt0.50 km6.56.36.7#104545387Asphalt0.39 km6.56.36.6#104444821Asphalt0.50 km6.56.36.6#104523937Asphalt0.50 km6.56.36.6#104524962Asphalt0.27 km6.56.36.5#104523925Asphalt0.50 km6.56.36.6#104523890Asphalt0.50 km6.56.36.6#104443810Asphalt0.50 km6.56.26.6#104525005Asphalt0.42 km6.56.26.6#104525003Asphalt0.50 km6.56.26.4#104443768Asphalt0.23 km6.56.26.6#104523866Asphalt0.50 km6.56.26.6#104443787Asphalt0.29 km6.56.26.6#104517220Asphalt0.39 km6.56.26.6#104545470Asphalt0.50 km6.46.26.4#104524984Asphalt0.50 km6.46.26.4#104523952Asphalt0.26 km6.46.26.4#104628922Asphalt0.50 km6.46.26.4#104523927Asphalt0.50 km6.46.16.5#104523809Asphalt0.50 km6.46.16.5#104524990Asphalt0.50 km6.46.16.4#104517221Asphalt0.25 km6.46.16.7#104523957Asphalt0.50 km6.46.16.5#104443769Asphalt0.50 km6.46.16.5#104523956Asphalt0.50 km6.46.16.5#104523898Asphalt0.50 km6.46.16.3#104628911Asphalt0.34 km6.36.16.5#104523871Asphalt0.50 km6.36.16.5#104523887Asphalt0.50 km6.36.16.5#104524993Asphalt0.50 km6.36.16.5#104523881Asphalt0.50 km6.36.16.3#109442968Asphalt0.50 km6.36.06.5#104523878Asphalt0.50 km6.36.06.3#104444872Asphalt0.50 km6.36.06.4#104523913Asphalt0.50 km6.36.06.5#104444867Asphalt0.06 km6.36.06.9#104444866Asphalt0.02 km6.36.06.9#104443811Asphalt0.01 km6.36.06.9#104628923Asphalt0.50 km6.36.06.4#104523915Asphalt0.50 km6.36.06.4#104524994Asphalt0.50 km6.36.06.3#104545397Asphalt0.41 km6.36.06.4#104628899Asphalt0.50 km6.36.06.4#104523827Asphalt0.50 km6.36.06.3#104523796Asphalt0.50 km6.26.06.3#104524967Asphalt0.50 km6.25.96.2#103966826Asphalt0.05 km6.26.06.7#104523870Asphalt0.45 km6.25.96.2#104523930Asphalt0.01 km6.25.96.7#104444865Asphalt0.03 km6.25.96.7#103966828Asphalt0.02 km6.25.96.7#104523894Asphalt0.50 km6.25.96.2#104222629Asphalt0.06 km6.25.96.7#104545382Asphalt0.45 km6.25.96.2#104628909Asphalt0.50 km6.25.96.3#104628913Asphalt0.50 km6.25.96.3#104740434Asphalt0.41 km6.25.96.3#109442967Asphalt0.50 km6.25.96.3#104595381Asphalt0.15 km6.25.86.3#104222577Asphalt0.03 km6.25.96.6#104545489Asphalt0.14 km6.25.96.5#104588818Asphalt0.04 km6.25.96.6#104628912Asphalt0.50 km6.25.86.2#104443785Asphalt0.50 km6.15.86.2#104628917Asphalt0.50 km6.15.86.3#104523850Asphalt0.23 km6.15.86.2#104523855Asphalt0.50 km6.15.86.2#104545491Asphalt0.05 km6.15.86.5#104443767Asphalt0.18 km6.15.86.3#104443790Asphalt0.24 km6.15.96.5#104222628Asphalt0.42 km6.15.76.1#104853676Asphalt0.09 km6.15.86.5#104588603Asphalt0.02 km6.05.76.4#104222626Asphalt0.14 km6.05.76.4#104232607Asphalt0.05 km6.05.76.4#104628925Asphalt0.50 km6.05.76.1#104545474Asphalt0.13 km6.05.76.4#104524989Asphalt0.01 km6.05.76.4#104523803Asphalt0.09 km6.05.76.4#109256010Asphalt0.13 km6.05.76.4#104444845Asphalt0.03 km6.05.76.4#104444823Asphalt0.12 km6.05.76.4#104525007Asphalt0.05 km6.05.76.4#104523857Asphalt0.01 km6.05.76.4#104524973Asphalt0.03 km6.05.76.4#104524974Asphalt0.03 km6.05.76.4#104444824Asphalt0.18 km6.05.76.4#104523810Asphalt0.50 km6.05.76.1#104525014Asphalt0.50 km6.05.76.0#104523867Asphalt0.50 km6.05.76.0#104545385Asphalt0.50 km6.05.76.2#109442965Asphalt0.47 km6.05.76.2#103990000Asphalt0.13 km5.95.66.1#104545393Asphalt0.29 km5.95.66.1#109442969Asphalt0.46 km5.95.66.0#104444820Asphalt0.50 km5.95.66.0#104384080Asphalt0.06 km5.95.66.1#104222578Asphalt0.05 km5.95.66.1#104545386Asphalt0.50 km5.95.66.1#104444826Asphalt0.50 km5.95.66.0#104628915Asphalt0.50 km5.95.56.1#104545398Asphalt0.38 km5.95.56.1#104443774Asphalt0.50 km5.95.56.1#104545487Asphalt0.50 km5.85.56.1#104443775Asphalt0.50 km5.85.56.1#104545473Asphalt0.50 km5.85.56.1#104443749Asphalt0.50 km5.85.56.1#104628900Asphalt0.35 km5.85.56.1#104628897Asphalt0.06 km5.85.56.0#109442966Asphalt0.50 km5.85.56.0#104523938Asphalt0.13 km5.85.56.1#104628926Asphalt0.36 km5.85.56.1#104443759Asphalt0.50 km5.85.56.0#104443783Asphalt0.50 km5.85.56.0#109715365Asphalt0.18 km5.85.56.0#104545477Asphalt0.50 km5.85.56.0#104525012Asphalt0.22 km5.85.55.9#104545483Asphalt0.22 km5.85.56.0#104523914Asphalt0.50 km5.85.56.0#104443794Asphalt0.26 km5.85.56.0#104523919Asphalt0.40 km5.85.56.0#104523900Asphalt0.50 km5.85.56.0#104523897Asphalt0.50 km5.85.56.0#104523928Asphalt0.50 km5.85.56.0#104523929Asphalt0.50 km5.85.56.0#104444818Asphalt0.17 km5.85.56.0#104444819Asphalt0.10 km5.85.56.0#104523933Asphalt0.50 km5.85.56.0#104443784Asphalt0.50 km5.85.56.0#104523886Asphalt0.12 km5.85.56.0#104443782Asphalt0.18 km5.85.56.0#104444822Asphalt0.20 km5.85.56.0#104523954Asphalt0.50 km5.85.56.0#104444848Asphalt0.18 km5.85.56.0#104444874Asphalt0.06 km5.85.56.0#109256009Asphalt0.07 km5.85.56.0#104443738Asphalt0.34 km5.85.56.0#104628908Asphalt0.50 km5.85.56.0#104628902Asphalt0.04 km5.85.56.0#109442962Asphalt0.50 km5.85.56.0#104524982Asphalt0.50 km5.85.56.0#104523906Asphalt0.50 km5.85.56.0#109715364Asphalt0.12 km5.85.56.0#104628907Asphalt0.37 km5.85.56.0#104545389Asphalt0.50 km5.85.56.0#104587417Asphalt0.44 km5.85.56.0#104523828Asphalt0.50 km5.85.56.0#104525008Asphalt0.04 km5.85.56.0#104525010Asphalt0.03 km5.85.56.0#104523824Asphalt0.50 km5.85.56.0#109256011Asphalt0.50 km5.85.56.0#104545378Asphalt0.50 km5.85.56.0#104523815Asphalt0.10 km5.85.56.0#104545380Asphalt0.50 km5.85.56.0#104523814Asphalt0.17 km5.85.56.0#104523812Asphalt0.50 km5.85.56.0#104545392Asphalt0.50 km5.85.56.0#104545381Asphalt0.58 km5.85.56.0#104523808Asphalt0.50 km5.85.56.0#104525011Asphalt0.05 km5.85.56.0#104523907Asphalt0.43 km5.85.56.0#104646029Asphalt0.40 km5.85.56.0#104523921Asphalt0.50 km5.85.56.0#104545486Asphalt0.50 km5.85.56.0#104523802Asphalt0.27 km5.85.56.0#104523776Asphalt0.08 km5.85.56.0#104524960Asphalt0.50 km5.85.56.0#104523876Asphalt0.05 km5.85.56.0#104646031Asphalt0.27 km5.85.56.0#104646030Asphalt0.30 km5.85.56.0#104587418Asphalt0.08 km5.85.56.0#104525017Asphalt0.03 km5.85.56.0#104523785Asphalt0.07 km5.85.56.0#104628919Asphalt0.07 km5.85.56.0#109256012Asphalt0.50 km5.85.56.0#104523770Asphalt0.50 km5.85.56.0#104443756Asphalt0.50 km5.85.56.0#104628916Asphalt0.50 km5.85.56.0#104443760Asphalt0.06 km5.85.56.0#104523908Asphalt0.11 km5.85.56.0#104628928Asphalt0.50 km5.85.45.9#104222576Asphalt0.02 km5.75.45.9#104523879Asphalt0.43 km5.75.45.8#104524995Asphalt0.50 km5.75.45.8#104545481Asphalt0.50 km5.75.45.8#104523884Asphalt0.50 km5.75.45.8#104545480Asphalt0.50 km5.75.35.8#104545472Asphalt0.50 km5.75.35.8#104443778Asphalt0.50 km5.75.35.8#104525015Asphalt0.50 km5.75.35.8#103989996Asphalt0.12 km5.75.35.9#104545478Asphalt0.50 km5.75.35.8#104443776Asphalt0.50 km5.75.35.8#104443780Asphalt0.50 km5.75.35.8#104523904Asphalt0.50 km5.75.35.8#104443772Asphalt0.50 km5.75.35.8#103990003Asphalt0.02 km5.75.35.9#104443755Asphalt0.50 km5.75.35.8#104443757Asphalt0.50 km5.75.35.8#104443753Asphalt0.50 km5.75.35.8#104443788Asphalt0.23 km5.75.35.8#104588821Asphalt0.09 km5.65.46.2#104523829Asphalt0.50 km5.65.35.8#104443740Asphalt0.03 km5.65.46.2#104743560Asphalt0.05 km5.65.46.2#104443751Asphalt0.50 km5.65.35.8#104443750Asphalt0.50 km5.65.35.7#104628903Asphalt0.50 km5.65.35.7#104628894Asphalt0.23 km5.65.35.7#104443777Asphalt0.50 km5.65.35.7#104443758Asphalt0.50 km5.65.35.7#104443754Asphalt0.50 km5.65.35.7#104523865Asphalt0.32 km5.65.35.7#104523864Asphalt0.50 km5.65.35.7#104523858Asphalt0.01 km5.65.35.7#104523854Asphalt0.50 km5.65.35.7#104523852Asphalt0.29 km5.65.35.7#104523851Asphalt0.47 km5.65.35.7#104523846Asphalt0.37 km5.65.35.7#104523845Asphalt0.50 km5.65.35.7#104523844Asphalt0.50 km5.65.35.7#104523843Asphalt0.26 km5.65.35.7#104523842Asphalt0.50 km5.65.35.7#104523771Asphalt0.50 km5.65.35.7#104523781Asphalt0.50 km5.65.35.7#104523916Asphalt0.39 km5.65.35.7#104523840Asphalt0.50 km5.65.35.7#104628895Asphalt0.50 km5.65.35.7#104523839Asphalt0.29 km5.65.35.7#104523838Asphalt0.50 km5.65.35.7#104523837Asphalt0.50 km5.65.35.7#104444833Asphalt0.50 km5.65.35.7#104545479Asphalt0.50 km5.65.35.7#104523819Asphalt0.12 km5.65.35.7#104523818Asphalt0.50 km5.65.35.7#104646027Asphalt0.09 km5.65.35.7#104523817Asphalt0.32 km5.65.35.7#104523816Asphalt0.40 km5.65.35.7#104523813Asphalt0.50 km5.65.35.7#104523811Asphalt0.50 km5.65.35.7#104523936Asphalt0.01 km5.65.35.7#104523807Asphalt0.50 km5.65.35.7#104523805Asphalt0.50 km5.65.35.7#104523804Asphalt0.50 km5.65.35.7#104523833Asphalt0.50 km5.65.35.7#104524996Asphalt0.50 km5.65.35.7#104523801Asphalt0.50 km5.65.35.7#104523795Asphalt0.50 km5.65.35.7#104524979Asphalt0.01 km5.65.35.7#104523853Asphalt0.08 km5.65.35.7#104523794Asphalt0.50 km5.65.35.7#104523793Asphalt0.50 km5.65.35.7#104523792Asphalt0.50 km5.65.35.7#104523791Asphalt0.50 km5.65.35.7#104524983Asphalt0.50 km5.65.35.7#104523790Asphalt0.50 km5.65.35.7#104523789Asphalt0.50 km5.65.35.7#104628927Asphalt0.20 km5.65.35.7#104523788Asphalt0.50 km5.65.35.7#104444834Asphalt0.50 km5.65.35.7#104444869Asphalt0.50 km5.65.35.7#104523841Asphalt0.50 km5.65.35.7#104523787Asphalt0.50 km5.65.35.7#104523784Asphalt0.50 km5.65.35.7#104523783Asphalt0.50 km5.65.35.7#109442961Asphalt0.38 km5.65.35.7#104523782Asphalt0.50 km5.65.35.7#104523778Asphalt0.50 km5.65.35.7#104523777Asphalt0.50 km5.65.35.7#104523775Asphalt0.50 km5.65.35.7#104523774Asphalt0.50 km5.65.35.7#104628904Asphalt0.50 km5.65.35.7#104628901Asphalt0.50 km5.65.35.7#104628924Asphalt0.50 km5.65.35.7#104444873Asphalt0.50 km5.65.35.7#104444864Asphalt0.33 km5.65.35.7#104523786Asphalt0.50 km5.65.35.7#104523806Asphalt0.50 km5.65.35.7#104523822Asphalt0.28 km5.65.35.7#104523832Asphalt0.21 km5.65.35.7#104444849Asphalt0.27 km5.65.35.7#104523859Asphalt0.50 km5.65.35.7#104523862Asphalt0.33 km5.65.35.7#104523863Asphalt0.50 km5.65.35.7#104444839Asphalt0.41 km5.65.35.7#104444835Asphalt0.50 km5.65.35.7#104523882Asphalt0.29 km5.65.35.7#104523901Asphalt0.12 km5.65.35.7#104523902Asphalt0.47 km5.65.35.7#104523903Asphalt0.50 km5.65.35.7#104444827Asphalt0.50 km5.65.35.7#104545485Asphalt0.15 km5.65.35.7#104545484Asphalt0.50 km5.65.35.7#104545476Asphalt0.16 km5.65.35.7#104523947Asphalt0.25 km5.65.35.7#104545394Asphalt0.50 km5.65.35.7#104523950Asphalt0.50 km5.65.35.7#104545390Asphalt0.50 km5.65.35.7#104545379Asphalt0.53 km5.65.35.7#104524980Asphalt0.21 km5.65.35.7#104525016Asphalt0.50 km5.65.35.7#104525013Asphalt0.06 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API reference
Road aggregate data via the Contour API
GET/api/v1/roads/dukes-highway-saRoad aggregate - scores, stats, risk profile, activity, segment list
GET/api/v1/roads/search?q=Dukes%20Highway&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 Dukes Highway?+

Dukes Highway is approximately 182 km long. At typical touring speeds, expect around 3 hours of driving end to end, excluding stops.

Is Dukes Highway sealed?+

Yes. Dukes Highway is fully sealed for its entire length.

Is Dukes Highway good for motorcycles?+

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

Can I drive Dukes Highway in a caravan?+

Yes. Dukes Highway scores 6.8/10 for caravans, making it a reasonable choice for towing. Watch for changes in surface and any steep gradients.

Is Dukes Highway good for an EV?+

Yes. Dukes Highway scores 6.0/10 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 Dukes Highway?+

Contour has identified 525 grey spots on Dukes Highway - 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: 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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