Automatically Add Travel Time Blockers to Calendar using Google Directions API

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Built by Kevin Armbruster Kevin Armbruster
Created on June 08, 2026

Description

Automatically add Travel time blockers before Appointments

This bot automatically adds Travel time blockers to your calendar, so you never come late to an appointment again.

How it works

Trigger**: The workflow is initiated daily at 7 AM by a "Schedule Trigger".
AI Agent**: An "AI Agent" node orchestrates the main logic.
Fetch events**: It uses the get_calendar_events tool to retrieve all events scheduled for the current day.
Identify events with location**: It then filters these events to identify those that have a specified location.
Check for existing travel time Blockers*: For each event with a location, it checks if a Travel time blocker already exists. Events that *do not have such a blocker are marked for processing.
Calculate travel time: Using the Google Directions API it determines how lot it takes to get to the location of the event. The starting location is by default your **Home Address, unless there is a previous event within 2 hours before the event, in which case it will use the location of that previous event.
Create Travel time blocker**: Finally, it uses the create_calendar_event tool to create the Travel time blocker with a duration equal to the calculated travel time + 10 minutes for buffer.

Set up steps

Set Variables
Home address
Blocker name
Mode of Transportation
Connect your LLM Provider
Connect your Google Calendar
Connect your Google Directions API

Nodes Used (5)

AI Agent
@n8n/n8n-nodes-langchain.agent
Call n8n Workflow Tool
@n8n/n8n-nodes-langchain.toolWorkflow
HTTP Request
n8n-nodes-base.httpRequest
OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow