# Road Straight

> A modular 4 × 4 m straight road tile running along Z: an asphalt slab with white edge lines and a dashed yellow center line for two lanes, raised curbs, paved sidewalks with joints and a storm drain. The bottom sits at y = 0 and the dash pattern repeats every 2 m, so tiles snap seamlessly into endless streets for city builders, racing and driving games.

![Road Straight preview](https://codels.download/m/road-straight.png)

Multi-view sheet (3/4, front, side, top): https://codels.download/m/road-straight.sheet.png

## Facts

- Category: Urban & Street › Roads & Tiles
- Size (W × H × D): 4.00 × 0.17 × 4.00 m — units are meters, +Y up, front faces +Z
- Origin: center of the base (y = 0)
- Triangles: 276 · Meshes: 23 · Materials: 7
- License: CC0-1.0 (Codels built-in)
- Tags: road-piece, sidewalk, street-tile, low-poly, stylized, modern, city, road, city-builder, endless-runner, racing-game, modular, platform, terrain, concrete, flat, game-ready, instancing-friendly, mobile-friendly, parametric, color-gray, size-large, poly-ultra-low
- Page: https://codels.download/models/road-straight

## Files

| Format | URL |
|---|---|
| three.js ES module (`createRoadStraight()`) | https://codels.download/m/road-straight.js |
| React Three Fiber component (`<RoadStraight />`) | https://codels.download/m/road-straight.jsx |
| Instancing module (`createRoadStraightInstances(count, place)`, one draw call per material) | https://codels.download/m/road-straight.instanced.js |
| Standalone HTML demo | https://codels.download/m/road-straight.html |
| glTF binary | https://codels.download/m/road-straight.glb |
| glTF binary, Meshopt-compressed (2–3× smaller; GLTFLoader needs `setMeshoptDecoder(MeshoptDecoder)`) | https://codels.download/m/road-straight.glb?compress=meshopt |
| glTF JSON | https://codels.download/m/road-straight.gltf |
| OBJ (vertex colors) + MTL | https://codels.download/m/road-straight.obj · https://codels.download/m/road-straight.mtl |
| STL | https://codels.download/m/road-straight.stl |
| CodelSpec JSON | https://codels.download/m/road-straight.json |

## Parameters

Append them as query parameters to any URL above to get a customized variant (e.g. `?lanes=...`).

| Param | Type | Range / options | Default | Current |
|---|---|---|---|---|
| `lanes` | int | 1 – 2 | 2 | 2 |
| `sidewalk` | boolean | true \| false | true | true |
| `asphalt` | color | #rrggbb | #41454b | #41454b |

## Parts

- asphalt (box · asphalt)
- edgeLine (box · white)
- edgeLine (box · white)
- centerDash (box · yellow)
- centerDash (box · yellow)
- curb (box · curb)
- sidewalkBase (box · base)
- paver (box · paver)
- paver (box · paver)
- paver (box · paver)
- paver (box · paver)
- curb (box · curb)
- sidewalkBase (box · base)
- paver (box · paver)
- paver (box · paver)
- paver (box · paver)
- paver (box · paver)
- drainGrate (box · grate)
- grateBar (box · base)
- grateBar (box · base)
- grateBar (box · base)
- grateBar (box · base)
- grateBar (box · base)

## How to use

Save the code below as `road-straight.js`, then:

```js
import { createRoadStraight } from './road-straight.js';
const model = createRoadStraight();
scene.add(model);
```

## Code

```js
/**
 * Road Straight — Codels 3D model library (https://codels.download/models/road-straight)
 * License: CC0-1.0 · Units: meters · Y-up · Front: +Z · Origin: center of the base (y = 0)
 * Triangles: 276 · Size (W × H × D): 4.00 × 0.17 × 4.00 m
 *
 * Usage:
 *   import { createRoadStraight } from './road-straight.js';
 *   
 *   const model = createRoadStraight();
 *   model.position.set(0, 0, 0);
 *   scene.add(model);
 */
import * as THREE from 'three';

export function createRoadStraight() {
  const root = new THREE.Group();
  root.name = 'RoadStraight';

  // Materials
  const asphaltMat = new THREE.MeshStandardMaterial({ name: 'asphalt', color: 0x41454b, roughness: 0.95, flatShading: true });
  const whiteMat = new THREE.MeshStandardMaterial({ name: 'white', color: 0xecebe4, roughness: 0.7, flatShading: true });
  const yellowMat = new THREE.MeshStandardMaterial({ name: 'yellow', color: 0xe9b72c, roughness: 0.7, flatShading: true });
  const curbMat = new THREE.MeshStandardMaterial({ name: 'curb', color: 0xb4b2ab, roughness: 0.9, flatShading: true });
  const paverMat = new THREE.MeshStandardMaterial({ name: 'paver', color: 0x92918b, roughness: 0.95, flatShading: true });
  const baseMat = new THREE.MeshStandardMaterial({ name: 'base', color: 0x64635f, roughness: 1, flatShading: true });
  const grateMat = new THREE.MeshStandardMaterial({ name: 'grate', color: 0x26292c, roughness: 0.6, metalness: 0.5, flatShading: true });

  // Shared geometries
  const boxGeo = new THREE.BoxGeometry(0.1, 0.006, 4);
  const boxGeo2 = new THREE.BoxGeometry(0.11, 0.006, 1);
  const boxGeo3 = new THREE.BoxGeometry(0.14, 0.165, 4);
  const boxGeo4 = new THREE.BoxGeometry(0.51, 0.13, 4);
  const boxGeo5 = new THREE.BoxGeometry(0.498, 0.02, 0.988);
  const boxGeo6 = new THREE.BoxGeometry(0.24, 0.006, 0.035);

  // Parts
  const asphalt = new THREE.Mesh(new THREE.BoxGeometry(2.7, 0.02, 4), asphaltMat);
  asphalt.name = 'asphalt';
  asphalt.position.set(0, 0.01, 0);
  root.add(asphalt);
  const edgeLine = new THREE.Mesh(boxGeo, whiteMat);
  edgeLine.name = 'edgeLine';
  edgeLine.position.set(-0.93, 0.022, 0);
  root.add(edgeLine);
  const edgeLine2 = new THREE.Mesh(boxGeo, whiteMat);
  edgeLine2.name = 'edgeLine';
  edgeLine2.position.set(0.93, 0.022, 0);
  root.add(edgeLine2);
  const centerDash = new THREE.Mesh(boxGeo2, yellowMat);
  centerDash.name = 'centerDash';
  centerDash.position.set(0, 0.022, -1);
  root.add(centerDash);
  const centerDash2 = new THREE.Mesh(boxGeo2, yellowMat);
  centerDash2.name = 'centerDash';
  centerDash2.position.set(0, 0.022, 1);
  root.add(centerDash2);
  const curb = new THREE.Mesh(boxGeo3, curbMat);
  curb.name = 'curb';
  curb.position.set(-1.42, 0.0825, 0);
  root.add(curb);
  const sidewalkBase = new THREE.Mesh(boxGeo4, baseMat);
  sidewalkBase.name = 'sidewalkBase';
  sidewalkBase.position.set(-1.745, 0.065, 0);
  root.add(sidewalkBase);
  const paver = new THREE.Mesh(boxGeo5, paverMat);
  paver.name = 'paver';
  paver.position.set(-1.745, 0.14, -1.5);
  root.add(paver);
  const paver2 = new THREE.Mesh(boxGeo5, paverMat);
  paver2.name = 'paver';
  paver2.position.set(-1.745, 0.14, -0.5);
  root.add(paver2);
  const paver3 = new THREE.Mesh(boxGeo5, paverMat);
  paver3.name = 'paver';
  paver3.position.set(-1.745, 0.14, 0.5);
  root.add(paver3);
  const paver4 = new THREE.Mesh(boxGeo5, paverMat);
  paver4.name = 'paver';
  paver4.position.set(-1.745, 0.14, 1.5);
  root.add(paver4);
  const curb2 = new THREE.Mesh(boxGeo3, curbMat);
  curb2.name = 'curb';
  curb2.position.set(1.42, 0.0825, 0);
  root.add(curb2);
  const sidewalkBase2 = new THREE.Mesh(boxGeo4, baseMat);
  sidewalkBase2.name = 'sidewalkBase';
  sidewalkBase2.position.set(1.745, 0.065, 0);
  root.add(sidewalkBase2);
  const paver5 = new THREE.Mesh(boxGeo5, paverMat);
  paver5.name = 'paver';
  paver5.position.set(1.745, 0.14, -1.5);
  root.add(paver5);
  const paver6 = new THREE.Mesh(boxGeo5, paverMat);
  paver6.name = 'paver';
  paver6.position.set(1.745, 0.14, -0.5);
  root.add(paver6);
  const paver7 = new THREE.Mesh(boxGeo5, paverMat);
  paver7.name = 'paver';
  paver7.position.set(1.745, 0.14, 0.5);
  root.add(paver7);
  const paver8 = new THREE.Mesh(boxGeo5, paverMat);
  paver8.name = 'paver';
  paver8.position.set(1.745, 0.14, 1.5);
  root.add(paver8);
  const drainGrate = new THREE.Mesh(new THREE.BoxGeometry(0.3, 0.012, 0.6), grateMat);
  drainGrate.name = 'drainGrate';
  drainGrate.position.set(1.17, 0.022, 1);
  root.add(drainGrate);
  const grateBar = new THREE.Mesh(boxGeo6, baseMat);
  grateBar.name = 'grateBar';
  grateBar.position.set(1.17, 0.028, 0.78);
  root.add(grateBar);
  const grateBar2 = new THREE.Mesh(boxGeo6, baseMat);
  grateBar2.name = 'grateBar';
  grateBar2.position.set(1.17, 0.028, 0.89);
  root.add(grateBar2);
  const grateBar3 = new THREE.Mesh(boxGeo6, baseMat);
  grateBar3.name = 'grateBar';
  grateBar3.position.set(1.17, 0.028, 1);
  root.add(grateBar3);
  const grateBar4 = new THREE.Mesh(boxGeo6, baseMat);
  grateBar4.name = 'grateBar';
  grateBar4.position.set(1.17, 0.028, 1.11);
  root.add(grateBar4);
  const grateBar5 = new THREE.Mesh(boxGeo6, baseMat);
  grateBar5.name = 'grateBar';
  grateBar5.position.set(1.17, 0.028, 1.22);
  root.add(grateBar5);

  root.traverse((o) => {
    if (o.isMesh) {
      o.castShadow = true;
      o.receiveShadow = true;
    }
  });
  return root;
}

export default createRoadStraight;
```

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