STEREOPHOTOGRAMMETRIC ANALYSIS OF ROAD
ACCIDENT SCENES
by
J. D, Moreland, B, Sc.» Ph. D, à I.LC.
Road Research Laboratory,
Department of Scientific and Industrial Research
SUMMARY
Trials have been made of a stereometric camera and its
associated autograph in recording and analysing road
accidents, Some examples are given of plans compiled to
illustrate accident sites. These Plans indicate features
such as road edges, markings, furniture, trees, walls,
fences, road signs and advertisement hoardings, Road
camber is measured when necessary, Vehicle positions
are plotted when possible and external car damage is
indicated,
A comparison is made between three different
surveys of one site made (i) using stereometric equipment
(ii) by a police "plan drawer" and (iii) by the county
engineer using conventional methods, Reference is made
to photogrammetric procedure accepted in English law,
The limitations of the equipment tested are briefly
outlined and a method of rapid vertical photography that is
being developed for routine use is mentioned.
On a fait des essais avec un appareil photographique,
stéréometrique et l'autographe y associf pour enregistrer
et analyser les accidents routiers, On donne quelques
exemples de plans dressés pour illustrer le lieu de
l'accident. Ces plans font voir les caractéristiques telles
que les bordures de route, les marques sur la chaussée,
les "accessoires" (tels que les montants des reverbéres,
les arrêts d'autobus, les boîtes à sable, etc. ), les arbres,
les murs, les barrières, les signes et les panneaux-réclame,