Izvorni znanstveni članak
Weather Types and Traffic Accidents
Z. Bencetić Klaić
Sažetak
Traffic accident data for the Zagreb area for the 1981–1982 period were analyzed to
investigate possible relationships between the daily number of accidents and the weather
conditions that occurred for the 5 consecutive days, starting two days before the particular
day. In the statistical analysis of low accident days weather type classification
developed by Poje was used. For the high accident days a detailed analyses of surface
and radiosonde data were performed in order to identify possible front passages. A test
for independence by contingency table confirmed that conditional probability of the day
with small number of accidents is the highest, provided that one day after it »N« or
»NW« weather types occur, while it is the smallest for »N1« and »Bc« types. For the remaining
4 days of the examined periods dependence was not statistically confirmed.
However, northern (»N«, »NE« and »NW«) and anticyclonic (»Vc«, »V4«, »V3«, »V2« and
»mv«) weather types predominated during 5-days intervals related to the days with small
number of accidents. On the contrary, the weather types with cyclonic characteristics
(»N1«, »N2«, »N3«, »Bc«, »Dol1« and »Dol«), that are generally accompanied by fronts,
were the rarest. For 85% days with large number of accidents, which had not been caused
by objective circumstances (such as poor visibility, damaged or slippery road etc.), at
least one front passage was recorded during the 3-days period, starting one day before
the day with large number of accidents.
Ključne riječi
Hrčak ID:
28332
URI
Datum izdavanja:
18.6.2001.
Posjeta: 1.197 *