RoadTwin
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KM 0+000 · Your road's digital twin

Drivethe roadyou live on.

Pick a start and a finish, anywhere up to 10 km apart. We build that stretch of road for your sim from public LiDAR, aerial photos and map data, with the houses and trees where they actually stand.

Build my road →

Starter $9.99 with your first road · Club $19.99 a month · you see the route before you pay

● Real-time render
Road
Hunter Mill Road
Length
1.98 km
Trees
8,847

Hunter Mill Road, recorded in the browser preview

● Oakton, Virginia: the elevation profile, straight from the LiDAR1.16 km · 22 m climb · high point 120 m
0+0000+2000+4000+6000+8000+1000
01
1 m
LiDAR spacing where the county has it. Crests and dips land where they are on the real road.
02
4,073
Trees on our 1.2 km test street in Oakton, each one placed from the canopy survey.
03
≈8 min
Per mile for a first build. Rebuilds are quicker because the data is already cached.
04
10 km
The longest road we build in one go.
KM 0+400 · The register

Roads we've built

Every picture here is a frame from the 3D preview that comes with each order, or from RoadTwin Simulator. Open one and have a look around.

Build yours →
Two of these roads are free.Download one tonight →The world test: 29 roads in 27 countries.Alpine passes, Arctic shores, city boulevards, farm lanes. Each built from two points on a map, nobody fixing it by hand.Fly any of them →
KM 0+500 · RoadTwin Simulator

Race your street. Roam the world.

Race your own neighborhood, legally, with no ticket to fear. Or free-roam scenic roads around the world at your own pace. RoadTwin Simulator is where your roads come to life: force feedback, SimHub motion, day to night and four seasons.

Early build · work in progress

Meet the simulator →
In-game screenshots from an early build of RoadTwin Simulator, and our two cars with their engines recorded in the game. Turn the sound on. Sound credits.
KM 0+600 · Check our work

Hold it up to the photo

Left of the handle is the aerial photo of Oakton suburbs. Right of it is our build of the same ground, flown from the same spot. Drag it across and check the bends, the houses and the trees.

Open Oakton suburbs →
Oakton suburbs: our 3D buildOakton suburbs: aerial photo
‹ ›
Aerial photoRoadTwin buildPhoto: Fairfax County, Virginia GIS: 2026 3-inch aerial photography (public) · flown in early spring, leaves off
KM 0+700 · Same road, two builds

Theirs on the left, ours on the right

We tested another product's build of the same area and put it in the same scene as ours: same sun, same sky, same camera. Drag the handle and judge for yourself.

Oakton: our 3D buildOakton: Other product build
‹ ›
Other productRoadTwin buildLeft: other product's build of the same area

Both builds run in our viewer under the same sun, sky and camera. Their textures are recompressed for the web, their terrain shader is baked to plain colour and their shader-patch trees are placed from their own tree file; effects that need Assetto Corsa's shader patch at run time (GrassFX grass) can't run in a browser. The live view downloads about 22 MB.

KM 0+800 · Head to head

We're new, so we checked

We didn't expect you to take our word for it. So we tested another product's track of the same area as our own test road in Oakton, Virginia, and measured both against Fairfax County's LiDAR survey, one sample per metre along each lane. Then we put the same car and the same robot driver on both.

We did the same on Stage Road in New Jersey. Accuracy came out level there, with our surface about twice as smooth and identical lap times to the tenth: 55.2 seconds each.

Where they still look better: their lawns are tidier up close and their tree crowns look fuller from a distance. We're working on both.

Oakton, VA · 1.2 km
RoadTwin
Other product
Height error vs county LiDAR (typical)
4.0–4.5 cm
4.2–5.4 cm
Height error, worst 5% of the road
7–8 cm
10–11 cm
Surface roughness (curvature, lower is smoother)
0.0013
4–9× smoother
0.006–0.012
Road centre vs the kerbs in a 3-inch photo (median)
0.30 m
0.70 m
Road width
measured every metre
one fixed width
Junctions with stop lines and signs
4 of 4
0 of 4
Trees
4,082 at LiDAR positions
1,098 estimated
› How we measured

Their track was converted with our own tools. Both road surfaces were sampled every metre along each lane and compared with USGS 3DEP and Fairfax County 1-metre LiDAR. Roughness is the RMS of vertical curvature, which is what you feel through the wheel as the car goes over facets in the mesh. Their scenery was viewed in our engine without their game's shader add-ons, so we don't compare looks with numbers, only geometry.

See every road in the gallery →
KM 1+200 · Route

From address to apex

  1. 1
    KM 1

    Pick two points

    Type addresses or paste coordinates. We show you the exact route on an aerial photo, how long it is and what it costs. Nothing is charged until you check out.

  2. 2
    KM 2

    We build it

    The build server gathers elevation, imagery, buildings and trees for a strip around your road and puts the track together. Your order page shows each stage as it happens.

  3. 3
    KM 3

    Fly it, then drive it

    Look the result over in the 3D preview, download the zip, unzip it into the tracks folder and pick it in RoadTwin Simulator.

KM 1+600 · Legend

Where the data comes from

We use the best public data each place has. In much of the US that means 1-metre LiDAR and aerial photos sharp enough to read a stop bar. Elsewhere it's national and global datasets. Every track lists its sources.

Road surface
Shaped from LiDAR or national elevation models, then smoothed so it drives like pavement instead of a staircase.
Width and markings
Measured kerb to kerb on aerial photos, with centre lines, stop bars and turn arrows where they're painted.
Buildings
Footprints from OpenStreetMap and open building datasets. Heights come from LiDAR where it exists.
Trees and verges
Placed and sized from canopy-height maps. Grass and ground colours come from the photos.
Junctions
Side streets, stop and give-way control, and street-name signs.
KM 2+000 · Toll

Try it for $9.99

The Starter is the simulator, both cars, the free roads and one road of your own up to 5 km, for $9.99 once. The Club is $19.99 a month: 50 km of new roads every month and every road in the library. If we can't build your road, you get your money back.

Price my roadPricing details
RoadTwin tollNo. 000417
Starter + road ≤ 5 km$9.99
Road ≤ 5 km$9
Road ≤ 10 km$19
Club, 50 km / month$19.99
Keep this ticketPaid ✓
KM 2+400 · Questions
Which roads can I build?+

Any public road a car can legally drive between your two points, up to 10 km. One-way streets are followed in their legal direction. You see the route before you pay.

How long does a build take?+

A few minutes for a short road. A long rural road in an area we haven't built before can take closer to an hour. We email you when it's done.

What do I need to drive it?+

RoadTwin Simulator, which comes with the Starter and the Club. Unzip a road into its tracks folder and it shows up in the start menu.

Can I look at it before I download?+

Yes. Every finished order comes with the same 3D preview as the roads on this page.

Is it an exact copy of the real road?+

The shape, elevation, width and junctions are measured. Buildings and trees sit where the data puts them and are about the right size, but they're drawn from a model library, so your neighbour's porch won't be there.

What if the build fails?+

We look into it and try again. If your road can't be built, we refund you.

Pick two points. We'll build the road.

Start a build →