---
title: "Caltrans lane and road closures physically in place RIGHT NOW."
method: GET
path: "/v1/tools/get_lane_closures"
---

# Caltrans lane and road closures physically in place RIGHT NOW.

`GET /v1/tools/get_lane_closures`

## Request

- Base URL: `https://mcp.commutescout.com`
- URL: `https://mcp.commutescout.com/v1/tools/get_lane_closures`
- Auth: one of:
  - none
  - API key in header `X-API-Key`
  - HTTP bearer

Caltrans lane and road closures physically in place RIGHT NOW.

    Data: the Caltrans Lane Closure System (LCS). Only closures that crews
    have actually established (CHP code 1097) and not yet picked up are
    returned - scheduled-but-not-started closures are excluded, so this is
    "what is blocking lanes now", not a construction calendar.
    Refresh: 5-minute cache over per-district Caltrans feeds.

    Filters: route (e.g. "I-80", "US 101", "1"); district (Caltrans district
    1-12, e.g. 3 = Sacramento/Tahoe, 4 = Bay Area, 7 = Los Angeles);
    center "lat,lon" with radius_km - closures whose begin or end point is
    inside the circle. For a town or place, center is the filter that
    catches work on EVERY road around it, including small state routes.

    Read closure_class on each record, it is what the closure means for
    through traffic:
    - "full-roadway": the road itself is closed in that direction. The only
      class that means "you can't drive through".
    - "ramp": a ramp or connector is closed (even when the raw record says
      "Full", that means the ramp is fully closed, not the highway).
    - "one-way-traffic": alternating single lane with flagging; passable
      with delays. Common on two-lane mountain roads.
    - "alternating-lanes", "moving", "traffic-break": rolling or brief work;
      minor delays.
    - "lane": some lanes closed; the lanes field says how many of how many.
    estimated_delay_minutes is present when crews reported one.
    Shoulder-only work is excluded entirely.

## Query parameters

- `route` string
- `district` integer
- `center` string
- `radius_km` number

## Response `200`

The tool's result.

- object

## Other responses

- `400`: A parameter is missing, unknown or malformed.
- `401`: The API key is unknown or revoked.
- `429`: Slow down; Retry-After says how long.

---

[API](https://skmtc.dev/commutescout/apis/commutescout-api.md) · [All operations](https://skmtc.dev/commutescout/apis/commutescout-api/llms.txt) · [OpenAPI document](https://skmtc.dev/commutescout/apis/commutescout-api/revisions/70427a609edf?raw)