Sections
Fifteen ready sections
Reserve widths from 11.9 m to 45.4 m, previewed in the panel.
Lotuz Arch
Lotuz Unban RoadRoads, junctions and markings in SketchUp
Draw an alignment and build the carriageway to one of fifteen standard sections, with curb-return junctions, QCVN 41:2019 markings and terrain following.
$40/ year
Lotuz Arch yearly — unlocks Sync, GIS and Max dashboard.
Requires: SketchUp 2025+ · Windows
Inside SketchUp
Roads with junctions, markings and sidewalks
Built from the alignment you draw, to standard sections and Vietnamese marking rules.
QCVN
Markings to standard
Centre line from lane count, 40 cm stop bar, arrows per available turn.
Roads with junctions, markings and sidewalks
A junction built with Lotuz Road
Junctions
Radius per corner
Individual curb returns, crossings, optional central island.
Terrain
Follows your ground
Ray-cast elevation, draped surfaces, embankments to the toe.
Sections
Fifteen ready sections
Reserve widths from 11.9 m to 45.4 m, previewed in the panel.
QCVN
Markings to standard
Centre line from lane count, 40 cm stop bar, arrows per available turn.
Junctions
Radius per corner
Individual curb returns, crossings, optional central island.
Terrain
Follows your ground
Ray-cast elevation, draped surfaces, embankments to the toe.
Real captures
Shot from the live plugins
No mock marketing UI — real SketchUp / 3ds Max / Photoshop panels from Lotuz workflows.
Audience
Who it is for
Detailed planning
A road network in a scheme needs the right reserve width, the right carriageway, sidewalks and junctions — not grey strips stretched roughly into place.
Infrastructure and earthworks
The alignment follows terrain already in your model, embankments run from the road edge down to the ground, and the land inside the corridor is patched without touching the original terrain mesh.
Masterplan visuals
Lane markings, arrows, crossings and street trees are all generated — the view down the street reads as a street, not an empty plane.
Existing Lotuz GIS users
Import the context with GIS, then draw the designed alignment over it. Same model, same plan.
Workflow
How you work — step by step
- 01
Draw the alignment
An alignment is just edges in SketchUp. Draw new ones from the tab, or reuse the roads you imported with GIS.
- 02
Pick a cross-section
Fifteen ready sections built to Vietnamese planning practice, from an 11.9 m internal street to a 45.4 m eight-lane avenue. Assign per alignment with tags.
- 03
Build
Select the alignments and press Build: carriageway, kerbs, sidewalks, median, junctions, markings and arrows are generated together.
- 04
Edit in place
Switch to Edit to set a radius per junction corner, change one alignment’s road type, or move a node. Only the affected part is rebuilt.
- 05
Toggle while you work
Hide what has been built to see the bare alignment, adjust the geometry, then bring it back.
Deep dive
Features in depth
▸
Fifteen sections to planning standards
From a 5.5 m internal carriageway to a 31 m eight-lane avenue with a median. Each section is a set of tagged bands — carriageway, kerb, sidewalk, median, cycle lane, planting strip. Add your own band, or save your own section.
▸
Markings per QCVN 41:2019/BGTVT
The centre line is derived from the section itself: one lane each way gives a broken white line, two or more gives the double solid yellow of marking 1.3, and a central median means no centre line at all. Stop lines follow marking 7.1 — a 40 cm solid bar set 60 cm back from the crossing.
▸
Arrows that work out the turns
Arrows are not placed by hand. Each approach works out where you can actually turn, from the bearings of the other arms at that junction, and emits an arrow per lane. A T-junction gets no arrow for a movement that does not exist.
▸
Junctions with the radius you want
Curb returns default to 6 m and widen automatically for wider roads, but every corner can be set individually. Crossings are included, and a central island when you need a roundabout.
▸
Lane drops that do not step
Where eight lanes meet four or two, each band is interpolated by tag over a length derived from the carriageway-edge offset, using a smooth curve so the edge has no kink. A band present on one side only closes to its own inner edge.
▸
It follows terrain you already have
Elevation is sampled by ray-casting onto your own terrain mesh on a 128×128 grid, the centre line is densified every 2 m, smoothed and grade-clamped. Surfaces and markings are draped onto that profile, embankments run down to the toe, and the corridor ground is patched separately so the original terrain is never edited.
▸
Trees and lights along the kerb line
They are spaced along the sidewalk edge rather than projected sideways from the centre line, so the row does not break where the sidewalk curves into a junction — and it clears the junction automatically.
▸
Skipped bands are reported, not swallowed
Any band that had to be dropped or routed around is recorded and returned with the result. Losing a patch of carriageway silently is very hard to spot in a large network.
Specs
In numbers
- Plan
- Lotuz Arch Pro — same plan as Lotuz GIS
- Ready sections
- 15, reserve width 11.9 m → 45.4 m
- Lanes
- 2 · 4 · 6 · 8, with or without a median
- Section bands
- Carriageway · kerb · sidewalk · median · cycle lane · planting strip
- Markings
- QCVN 41:2019/BGTVT — markings 1.3, 7.1, arrows 9.3
- Corner radius
- 6 m by default, per-corner override
- Terrain sampling
- 128×128 ray-cast grid onto your existing mesh
- Centre-line densify
- Every 2 m before smoothing the profile
- SketchUp version
- SketchUp 2025 or newer
FAQ
Common questions
How is this different from roads imported by GIS?+
GIS brings in what exists: real roads at OSM widths, used as context. Lotuz Road is a design tool — you draw the alignment and it builds the carriageway to a chosen section, with junctions, markings and terrain following. They share a model and the same Arch Pro plan.
Do the markings follow Vietnamese standards?+
Yes. Centre lines, stop lines and directional arrows follow QCVN 41:2019/BGTVT, down to details like the 40 cm stop bar set 60 cm back from the crossing.
Does it work on sloping sites?+
It does. Elevation comes from the terrain mesh already in your model, the profile is smoothed and grade-clamped, and embankments run down to the toe. The original terrain is not modified — the patch is displayed under the road group.
Do I have to rebuild everything to make a change?+
No. Edit mode changes a corner radius, an alignment’s road type or a node position, and only the affected part is rebuilt. Hide the built geometry when you want to see the bare alignment.
Can I take it to 3ds Max?+
Yes — it is ordinary SketchUp geometry, so Lotuz Sync pushes it across like anything else. Sync is in the same Arch Pro plan.
How do I buy it?+
Lotuz Road ships inside Lotuz Arch Pro, in the same installer as GIS, Sync and the Dashboard. Install it and sign in with an account on the plan.
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