STRADA is a national information system collecting data of injuries
and accidents in the entire road transport system. STRADA is based
on information from the police as well as the hospitals.
In October 1996 the Swedish Road Administration was commissioned
by the Swedish government to initiate a new information system
covering injuries and accidents in the entire road traffic system:
STRADA. The governmental commission was accomplished in
co-operation with the Swedish Police, the Swedish National Board of
Health and Welfare, the Swedish Institute for Transport and
Communications Analysis, Statistics Sweden and the Swedish
Association of Local Authorities and Regions.
From 2009 onwards the Swedish Transport Agency is the authority
responsible for STRADA.
Information from the police as well as the hospitals
STRADA is based on information reported from two sources. As a
mandatory assignment for all police districts since 2003, the
Swedish Police report to STRADA on a national scale. STRADA also
receives information from an increasing number of hospitals. The
incorporation of hospital data makes this method very different
from earlier methods of registration of injuries and accidents in
the road transport system.
Two sources of information provides a better picture of the
accident
STRADA was created in close collaboration with all parties
concerned. By bringing together data from two sources – the
police and the hospitals – STRADA provides more detailed
information, thus increasing the knowledge of road traffic injuries
and accidents. When hospital data is included there is also a
decrease in the number of unrecorded cases, since the police have
limited knowledge about some road traffic accidents (mainly
involving unprotected road users: pedestrians, cyclists and moped
drivers). In addition, the hospitals’ reporting of diagnoses
broadens the knowledge of the injuries and their degree of
seriousness. 18 counties report to STRADA on a complete or partial
basis. The remaining three counties are yet to join.
Data from STRADA
By accessing STRADA’s web-based system for extraction of
data or by requesting information from the Swedish Transport
Agency, municipalities, researchers etc. can make use of the
information in STRADA.
Official statistics from police reports
Since 2003 the official statistics of road traffic injuries are
based on data extracted from STRADA. Since a number of hospitals do
not yet report to STRADA, the existing official statistics are
based exclusively on accidents reported by the police. The
information derived from the hospitals is shown in a supplement
containing medical statistics.