Wide Road Stage
Add or remove stacked lanes, dash the centers, drop a crosswalk stripe and curb-height walker, then pinch-zoom the flat asphalt world with sky band and a few trees.
Offline traffic workbench
Flatlane Crosswalk
Stack flat lanes, drop side-silhouette traffic, and scrub one shared timeline until the crosswalk gaps actually open—then export the walk windows.
Side-view only
No scores
PDF export
100% offline
On-device scenes—no accounts, ads, or network calls. Build roads at the kitchen table.
Workbench calm. Bold solids, thick outlines, asphalt lanes, dashed markings, flat sky and trees—entertainment for curious gap-watchers, not a driving sim.
7 toolsStage, tray, scrub, gaps, library, compare, PDF
100% offlineOn-device scenes—no accounts or network
4 seedsSample roads ready on first launch
Ages 9+Entertainment traffic-workbench band
Illustrative marketing figures; not App Store metrics.
What it is
Flatlane Crosswalk is an offline side-view traffic toy and crossing-gap workbench. You paint a multi-lane cartoon road stacked top-to-bottom, drag geometric cars, trucks, and buses from a tray, flip each vehicle’s direction, set its speed and start offset, then drag a playhead so every body slides continuously past the stripe. Safe intervals light up when every lane clears the walk box for your chosen duration—no spreadsheets, no crash loops, no scores. Pre-seeded scenes load instantly; save layouts, compare two side-by-side with locked playheads, and share stage plus gap readout as a PDF. Bold solids, thick outlines, asphalt, dashed marks, flat sky and trees. Fully free, on-device, no accounts.
Workbench pieces
Vehicle Tray & Lane Controls
Drag side-silhouette cars, compact trucks, and buses onto any lane; tap to flip left/right, type numeric speed, and offset start position along the timeline.
Timeline Scrub Strip
Drag one playhead across seconds so all traffic moves live; play/pause at 0.5×, 1×, or 2× with zero points, cash, or collision theater.
Crossing Gap Readout
While scrubbing, highlight intervals when every lane clears the walk box for your walk duration, with next window start/end and a simple go/wait cue.
Compare & Seed Library
Open quiet two-lane, busy bus mix, reverse-flow, or school-zone samples; save locally, then stack or toggle two scenes with synchronized playheads.
Share sheet
PDF Export & Quick Presets
Render stage frame, lane list, speed/direction table, and gap windows to a multi-page PDF via the share sheet; one-tap clear, mirror, uniform speed, or reset playhead.