Skewed intersections, Victoria
Intersections where a side road meets the through road at less than 70°, outside the Austroads range of 70–110°. Measured on Vicmap Transport road centrelines. A design screen, not a risk score.
A skewed intersection is one where the roads meet well away from a right angle. This map locates them across Victoria.
What can this map do?
– intersections shown
Angle band
Junction type
Injury crashes at these intersections, 2020–2024
Show intersections with at least
0 1 2 3 5
injury crashes of any severity Fatal or Serious Injury (FSI) crashes Fatal crashes involving any vehicle involving a heavy vehicle involving an articulated truck involving agricultural machinery
Heavy vehicle networks (NHVR)
All intersections Any network below
B-Double Higher Mass Limits (HML) PBS Level 1 PBS Level 2 PBS Level 3 Road trains Oversize/overmass and low loaders Agricultural vehicles (oversize/overmass) Grain Harvest Management Scheme Livestock vehicles (HPLV) Emergency drought network Port of Melbourne container routes Superload indicative routes Listed on any approach the through road the side road
Shows whether each approach road appears on an NHVR network map, read on 3 October 2026, measured 60–80 m from the junction (access can change closer in). It is not turn approval, not a safety assessment and not for route compliance: always check the NHVR National Network Map . Agricultural, grain and drought networks change with the season.
More filters
Roads involved
By default at least one road is a highway, arterial, sub-arterial or collector.
One-way side roads
A one-way side road that feeds into the through road at a shallow angle, such as one arm of a triangle junction.
Traffic signals (SCATS)
Surrounding land use (VLUIS)
Surrounding parcel tenure (VLUIS)
How this was made
Roads: Vicmap Transport TR_ROAD, operational, named roads of class 1–6 (highway to minor road). Unnamed roads, freeways, ramps, slip lanes, roundabouts and named service, bus-access, slip and car-park roads are not used.Intersection: a network node where at least three legs of at least two differently named roads meet. Nodes touching a slip lane, ramp, freeway, roundabout, bridge, tunnel or service-road segment (bridge and tunnel ends are usually grade separations), and nodes within 50 m of a roundabout, are excluded.Angle: each road's direction is taken along its approach, from 20 m to 80 m out, following the same-named road through short links such as the median crossing of a divided road. The through road is the same-named pair of legs closest to a straight line (at least 120°, so a through road that bends at the junction still counts). The angle is the acute angle between the side road and the through road's average direction (T and X). Where there is no through road (Y), it is the angle between the two roads of the fork. Intersections under 15° (mostly mapping overlaps) and those whose near (10–50 m) and far (20–80 m) directions differ by more than 15° are excluded. Nodes within 25 m with the same set of road names, such as both carriageways of a divided road, are shown once.One-way side roads: where the side road is one-way away from the junction and through traffic peels off into it at the shallow angle (a slip-off, like one arm of a triangle junction), the intersection is left out, because no turn is made across the acute angle. One-way side roads that feed in (merge arms) are kept and labelled, and can be hidden under More filters. Direction of travel comes from Vicmap Transport.Accuracy: angles come from mapped centrelines, so a few degrees of error is normal. Results in the mild band (60–70°) sit close to the guidance limit and are the least certain.Guidance: Austroads Guide to Road Design Part 4A recommends intersecting angles between 70° and 110°.Traffic signals: DTP SCATS traffic signal sites (intersection type, May 2026) within 40 m of the intersection. Pedestrian-only signals are not counted.Land use: VLUIS 2021/22 land-use classes within 30 m. "Agricultural" means cropping, grazing, dairy, horticulture, vineyards, specialised livestock or aquaculture make up at least half of the parcel area.Land tenure: VLUIS 2021/22 release 3 (DEECA). Within 30 m of the intersection, parcel area is split into Crown tenure and Freehold; "Crown land" means Crown is at least half of that area. Freehold is not necessarily private.Crashes: Victoria Road Crash Data (DTP), injury crashes from 2020 to 2024 whose road geometry is coded as an intersection, grouped as Fatal, Serious Injury and Other Injury. "Heavy vehicle" uses the state's heavy-vehicle flag; "articulated truck" means a prime mover (including B-double and B-triple); "agricultural machinery" is the vehicle type "plant machinery and agricultural equipment". These say a vehicle of that type was involved, not that it caused the crash.Heavy vehicle networks: National Heavy Vehicle Regulator (NHVR) National Network Map, published vector tiles read on 3 October 2026. Each approach is followed 60 m and 80 m out from the junction. It counts as listed only when an NHVR network line is within 18 m at both points, runs within 15° of the approach, and is clearly closer to that approach than to any other road at the junction. Otherwise it is "not listed" or, when the match is not clear-cut, "unclear match", which the filters do not count as listed. "Listed on one approach only" means the network reaches the junction along one approach of that road but not the other. "Listed with conditions" and "marked restricted" repeat NHVR's access codes for that road segment; the conditions themselves are only on the NHVR map. Status is read 60–80 m from the junction, so a change in access closer to the junction is not picked up. Railway level crossings come from OpenStreetMap and NHVR network points; weight-limited structures and turn restrictions from NHVR network points. Each counts only when it lies within 15 m of an approach, up to 130 m from the junction. A listed through road and side road do not mean the turn between them is approved. Checks: a tile-detail check (200 junctions) found the coarser NHVR tiles used here give the same result as the detailed tiles for 99% of approaches; this tests tile detail, not accuracy. In a hand check of 50 junctions under 30° on the B-Double network, 48 looked right and 2 were uncertain; 7 had at least one approach shown as an unclear match.
Not a risk score. Angles come from a 1:25,000 centreline network, not survey. Crash counts are not adjusted for traffic volume. In our own check, a pooled comparison of skewed and right-angle intersections changed direction once split by road class and number of legs, so it was confounded and is not published.
This page is a view, not a data service. Source data remain CC BY 4.0: cite the Department of Transport and Planning and Vicmap (State of Victoria). The derived site classification is not offered for download.
Analysis and map by Sabour Khosravi , Safefuture Lab @rCITI-UNSW .