Guernsey Arterial Road Surface, Width, and Passability (2020-2024)

HeiGIT generated this geospatial dataset for Guernsey's arterial roads using AI analysis of PlanetScope satellite imagery from 2020 and 2024. It maps approximately 100 km of road segments, providing surface types, width classes, and passability scores to supplement OpenStreetMap data. The analysis focuses on motorway, trunk, primary, and secondary road classifications.

Use Cases

• Emergency logistics planning using the Humanitarian Passability Index (HPI) to determine route accessibility for heavy vehicles
• Infrastructure monitoring by tracking Road Surface Change from unpaved to paved between 2020 and 2024
• Fleet management using Road Width Class to filter segments capable of supporting two-lane heavy truck flow (Class 3)

Strengths

• 89.2% accuracy for AI-derived surface models compared to 64.7% for OSM tags
• Multi-temporal coverage (2020 and 2024) for change detection
• Standardized width classifications based on physical vehicle constraints

Limitations

• Small geographic footprint restricted to the island of Guernsey
• Excludes non-arterial road classes which may be critical for local access
• AI predictions may be affected by environmental factors like heavy tree canopy

Provenance

Source

HeiGIT (Heidelberg Institute for Geoinformation Technology)

Collection Method

AI-derived predictions from PlanetScope satellite imagery integrated with OpenStreetMap road geometries

Time Range

2020-2024

Freshness

The dataset uses imagery from 2020 and 2024 and was last updated in March 2026.

Geography

Guernsey