Road & Traffic System - Paint Cities, Bridges & AI Traffic

Don't place roads — PAINT them. Drag out connected road networks in the

Scene view, click tiles up into bridges, then press one button and AI

traffic drives your city: braking, signalling, parking, following routes

you draw per car. 76 prefabs + full C# source. Cars included.

ROAD DRAWER (editor tool, included)

• Left-drag paints roads — ends, straights, turns, T-junctions and

  crossroads are chosen and rotated automatically as you draw

• MIX ROAD FAMILIES on one grid: one-way, two-way, four-lane — taper

  transitions are inserted automatically where widths change

• TWO STYLES per tile: raised sidewalks with real curbs, or bare asphalt

  strips that sit on your own terrain — mix them freely

• ELEVATION MODE: click a tile to raise it one level — straights between

  levels become ramps automatically, support pillars stack under the

  deck. Build overpasses, highway bridges and sunken underpasses.

• Roundabout stamp, crosswalk mode, per-tile SPEED painting (with

  scene-view speed labels), traffic lights per junction or auto-placed

  network-wide, erase mode, full Undo

TRAFFIC SYSTEM (included, plain runtime C#)

• One button adds moving traffic INSTANTLY — right in the Scene view,

  no Play mode needed: right-lane driving, safe spacing, red-light

  stops, roundabout circulation, ramps and bridges

• Jam-proof: blocked cars find a detour, and if the road is edited under

  a moving car it re-plans its route on the spot

• PER-CAR ROUTES with zero code: give any car an ordered list of stops —

  drive through, WAIT in the lane (bus stop) or PARK at the curb, each

  with its own duration — then loop, ping-pong, shuttle via home,

  keep wandering or DESPAWN at the end (traffic sinks)

• Pick everything visually: place-on-tile, click-to-add stops with

  numbered scene markers, spawn/destination tiles on the manager

• Scriptable: SetTarget()/ParkAt()/GoToStop()/Continue(), StopReached &

  Parked events, per-car speed override — add TrafficAgent to your own

  vehicle and it joins the traffic

• 15 CARS INCLUDED (sedan, pickup, van × 5 colours) — the pack is fully

  self-contained

61 ROAD MODELS

• 3 families × 8 pieces (straight, turn, T, cross, end, crosswalk,

  half-ramp, full-ramp) in BOTH styles

• Roundabout (both styles), 3 taper transitions (both styles), pavement

  lot, bridge pillar, traffic light, street lamp, stop sign

THE DETAILS

• Ultra-light: tiles 50–350 tris, value-based URP Lit materials — no

  textures, recolour everything in seconds

• Unified 16 m grid, center pivots at ground level

• Showcase scene included: a full mini city with a working bridge,

  speed zones, bus route, parking shuttle and live traffic — press Play

• Everything is a plain prefab + ScriptableObject kit: point the drawer

  at YOUR prefabs and it paints with them, zero code changes

Pairs with our free Stylized Car Pack and the Complete Car Pack — same

scale, same style. Built for URP.