---
title: "Transit isochrone — Class A Atlas glossary"
description: "Map of areas reachable within X minutes by public transit."
canonical: https://classa.info/glossary/transit-isochrone
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> Map of areas reachable within X minutes by public transit.

## TL;DR

- Map of areas reachable within X minutes by public transit.
- Standard site-selection tool.

# Transit isochrone

*Strategy · Global*

## Short definition

Map of areas reachable within X minutes by public transit.

## Full definition

Standard site-selection tool. 30-, 45-, and 60-minute isochrones around candidate buildings, overlaid with workforce home addresses. Best [Class A](/glossary/class-a) sites maximise the workforce-overlap percentage.

## Why this matters for Class A leasing

Transit isochrone is part of the strategy vocabulary that institutional Class A occupiers, landlords, and advisers use across Global markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks regional variation alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

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Citation: Source: Class A Atlas (https://classa.info/glossary/transit-isochrone), updated 2026-04-01T00:00:00.000Z.