Isochrones' shows :

Question

Isochrones' shows :

Accepted Answer

Isochrones show lines of equal travel time from a given point across a geographical area. This means that every location on a specific isochrone can be reached from the starting point in the same amount of time. This is useful for understanding accessibility and visualizing travel times.

Here's why the other options are incorrect:

*   **Option 1: Trend of maximum traffic.** While isochrones can *indirectly* be influenced by traffic (as traffic affects travel time), they don't directly show the *trend* of maximum traffic. Isochrones represent travel *time*, not traffic volume. A high-traffic area would simply result in isochrones that are closer together, indicating slower travel times.

*   **Option 2: Communication of travellers and railway.** Isochrones are a visual representation of travel time, not a communication system between travelers and the railway (or any other mode of transport). They are a planning and analysis tool.

*   **Option 4: Depiction of traffic directions through coloured lines.** While colored lines *could* be used to represent different travel times on an isochrone map, the fundamental purpose of isochrones is to show lines of *equal* travel time, not to depict traffic directions. Traffic direction might influence the *shape* of the isochrones, but it's not what they primarily depict.