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RHD Operational Procedure – Technical Services Wing
Road Design and Safety - Road Safety Division
OP/RDS/3.1 - Collection and Processing of Road Traffic Accident Data
Purpose and Scope :

This procedure describes the process for the collection of road traffic accident (RTA) data for either a specific project area (including on a National basis for the Annual Road Safety Engineering Report), or for a specific route, or for a specific location. The procedure includes processing of the data into a reporting format and issuing a RTA Data Report.
Definitions :

BRTA - Bangladesh Road Transport Authority, Old Airport Road, Allenbari, Tejgoan, Dhaka.

RSC - Road Safety Cell BRTA. The RSC is the custodian of the National RTA Database. The contact details for matters relating to the RTA Database are: The Manager, BRTA Road Safety Cell, House 10A, Road 25A, Banani, Dhaka. Attention: Accident Data Analyst.

RTA - Road traffic accident.

RTA Data Report - A brief report, which presents the collected data. This report is the outcome of this procedure. At the conclusion of the procedure, the report is issued by presenting a copy to the person who issued the instruction to collect accident data. A copy is also to be kept on file.
Responsibility :

Executive Engineer, Road Safety Division - Normally the EE-RSD will be the person issuing the instruction to collect RTA data. The EE may receive a request to supply RTA data from the SE-RDS or from the EE-RDSD or the EE may initiate the instruction to collect accident data as part of another procedure. The EE is also responsible for commissioning the procurement of consultancy services, if required, for the collection of accident data and for receiving the Consultant’s Report.
Method :


The RSC is the custodian of the National RTA Database. Accident data is collected by the Thana level Police by completion of a specially designed Police form. This information is sent to one of ten Accident Data Units (ADUs) where it is loaded onto a computer and an electronic copy of the data is sent via Police Headquarters to the RSC. The ADUs are managed by the Police Range and Metro Deputy Inspector Generals (DIGs), with their technical direction being provided by the RSC. The Police use the database information for their own road safety enforcement needs, but their is no need for the RHD, or any other organisation, to approach the Police Range and Metro DIGs with a request for RTA database information.

The request for RTA data should be made directly to the RSC. The National RTA Report 2002 contains a section on how to access the database and it provides details of the content of the database and the scope of captured accident data. The request is made by completing a standard form, available from the RSC, which will guide the person requesting the information through the process for correctly specifying the area of interest and the selection of data fields (scope of the required data). The request for data can be made by fax, written correspondence or e-mail.


Under-reporting is a significant feature of the RTA database. The data received from the RSC is likely to be sufficient for national or regional reporting, but it is not likely to be adequate for reporting on a specific short section of highway or a specific location. The data held in the National RTA database can be supplemented by data collected by RHD Zone and field offices and cross-checks can be made against data acquired from the media and others sources.

For specific routes or locations, following a site inspection to assess the potential accident occurrence (by observation of traffic conditions and potential conflicts, with casual interviewing of persons in the area), it may be considered appropriate to formally collect details of fatal accidents which have occurred in the past year and other accident in the past three months, through the structured interviewing of samples of persons living or working in the immediate environs of the site. Consultants could be commissioned to do this work. During the site inspection, discussions with the Thana Police may be useful in determining the actual incidence of traffic accidents in the area of interest and the identification of road user movement patterns and conflict locations.


Once all the data is collected, it is assembled into a report for presentation to the person who issued the instruction to collect data. Depending on the brief given in the instruction to collect data, the data may need to be sorted and summarised before assembling it in the RTA Data Report. Ways of processing the data for reporting are contained in the Road Safety Engineering Procedures referenced below. MAAP software, used by the RSC, is a useful tool for expending the sorting and summarising of accident data.

After issuing and distributing the Report, copies of the report are filed together with all other documentation drafted or received during the execution of the procedure.
References :

· National Road Traffic Accident Report 2001, BRTA Road Safety Cell.

· National Road Traffic Accident Report, 2002, BRTA Road Safety Cell.

· Road Safety Engineering Procedure Note 1: Identifying Hazardous Locations in Bangladesh – Site Selection Techniques (RRMP2, IDC)

· Road Safety Engineering Procedure Note 2: Treating Accident Black spots in Bangladesh (RRMP2, IDC)

· Road Safety Engineering Procedure Note 3: Route Studies in Bangladesh (RRMP2, IDC)

· RHD Operational Procedure for Procuring Consultants, OP/PC/2.4
Procedure Flowchart :

The procedure flowchart for this procedure is detailed below -




For duties associated with each grade of personnel see


Updated on : 1/12/2003