API Version Description Updated
Traffic 1.0 Traffic incidents by offence and year 26/06/2019 XML JSON Embeddable HTML HTML
Collisions 1.0 Traffic collisions by year 26/06/2019 XML JSON Embeddable HTML HTML
Injuries 1.0 Traffic injuries by type and extent of injury 26/06/2019 XML JSON Embeddable HTML HTML
Classifications 1.0 Traffic injury classifications (fatal, serious, slight) 26/06/2019 XML JSON Embeddable HTML HTML

Source: http://www.guernsey.police.uk/article/6078/Publications