SGOnTime Data Sources, Coverage & Freshness

Sources used by the data adapters

Service	Source	Important limit
Camera snapshots	LTA via data.gov.sg	Only cameras returned by the source. Images, not continuous video. No immigration wait estimate.
HDB availability	data.gov.sg transport feed	Carpark codes and lot categories; not tariffs or complete address data.
Traffic, roadworks, travel times	LTA DataMall	Requires an active AccountKey. Road projects are not automatically closures.
Bus arrivals, rail advisories, station crowds	LTA DataMall	Requires AccountKey. Estimates and notices are not punctuality guarantees.
EV points	LTA DataMall	Postal-code lookup; supplied operator coverage and field completeness vary.
ERP rates and changes	OneMotoring / LTA announcements	Official external rate lookup. Calculators do not infer complete route charges.

Freshness is visible

Camera and HDB records use source timestamps where supplied. An image or count older than ten minutes is labelled out of date; missing or invalid times remain unknown. For LTA responses without a source timestamp, we show retrieval time and do not pretend it is the time of the event.

Successful responses are cached briefly at the edge. Camera and parking adapters request roughly one-minute caching, bus arrivals twenty seconds, and less volatile datasets longer. An unavailable source is never replaced with fabricated data. Some feeds require a site-owner API key before they can operate.

Licensing and attribution

Government datasets are used under the applicable Singapore Open Data Licence and source-specific conditions. Attribution is displayed next to data. Camera URLs are displayed as supplied; SGOnTime does not build a historical image archive. Rights to third-party material are not implied by access to an API.