Road On Road turns curves into complete, photorealistic road networks. Draw a road by clicking on your terrain, and Road On Road builds the pavement, lane markings, curbs, gutters, sidewalks, medians, lights and street furniture along it. Where roads meet it builds the junction: curb returns, sidewalk corners, crosswalks, stop lines, turn arrows and traffic signals that face the right way. Where a road leaves or joins another at a shallow angle it builds a real merge, with an acceleration or deceleration lane, a taper and a painted gore. Raise a road and it gets an embankment, then piers; take it across a valley and a bridge appears.

Every road is its own curve with its own settings, so each section of a network can be a different road: a six-lane highway, a boulevard with a planted median, a city street with parking, a cobblestone lane or a dirt track. Lanes in each direction, lane width, line styles and colors, surface, curbs, sidewalks and pavers, median, supports, bridge type and extras are all editable per road, and roads of different widths that meet end to end blend smoothly.

Weather is part of the look. Rain makes the pavement wet and reflective, fills wheel ruts and gutters with puddles and animates rain ripples; snow covers curbs, sidewalks and lane edges while traffic clears the wheel tracks, and adds plowed snow banks. Street lights and signals glow at night, and the signals cycle through their phases when you play the animation.

Features

• Draw Road tool: click on the terrain, snap to road ends and sides, raise points with the mouse wheel
• 11 road types: highway, expressway, boulevard, avenue, city street, residential, one-way, rural, ramp, old town, dirt
• Junctions with any number of roads: curb returns, sidewalk corners, crosswalks (zebra, ladder, lines), stop lines and turn arrows
• Traffic signals (US mast arms on the far side, or EU posts) with pedestrian heads, stop and yield signs, roundabouts
• Highway ramps: acceleration and deceleration lanes, tapers and painted gores
• Piers in four styles, embankments or retaining walls, decks with parapets, and five bridge types: girder, concrete arch, steel truss, cable-stayed and suspension
• Roads follow the terrain, and Fit Terrain to Roads grades the ground under them
• Street lights in four styles, guardrails, concrete barriers, speed signs, hydrants, benches, bins, bollards, manholes, storm drains, road studs and delineators
• Rain, snow and night looks, optional real lights at every lamp
• Procedural materials: aggregate, cracks, patches, wheel paths and oil, worn paint, pavers; no image textures
• Live: editing a curve rebuilds only the roads and junctions it touches

Requires Blender 4.2 or newer. Tested on Blender 4.2, 4.5 and 5.2 LTS.