Advanced

Drivers’ speed behaviour at a Zebra Crossing: a case study

Varhelyi, Andras LU (1998) In Accident Analysis and Prevention 30(6). p.731-743
Abstract
The purpose of the study was to (1) observe the frequency of giving way to pedestrians at the zebra crossing, (2) reveal speed adaptation problems, (3) examine if the time difference between the arrival of the pedestrian and the car have any influence on the speed of the approaching car, (4) identify so-called “ideal” situations (in which the car brakes on the driver’s own initiative in order to give way to a pedestrian) upon which recommendations can be given for implementing means to improve speed behaviour at zebra crossings. It was hypothesised that the speed behaviour of drivers approaching the zebra crossing depends on the pedestrian’s arrival at the curb related to the car’s expected arrival at the zebra crossing. The speed was... (More)
The purpose of the study was to (1) observe the frequency of giving way to pedestrians at the zebra crossing, (2) reveal speed adaptation problems, (3) examine if the time difference between the arrival of the pedestrian and the car have any influence on the speed of the approaching car, (4) identify so-called “ideal” situations (in which the car brakes on the driver’s own initiative in order to give way to a pedestrian) upon which recommendations can be given for implementing means to improve speed behaviour at zebra crossings. It was hypothesised that the speed behaviour of drivers approaching the zebra crossing depends on the pedestrian’s arrival at the curb related to the car’s expected arrival at the zebra crossing. The speed was measured on randomly selected “free” passenger cars which approached a non-signalised mid-block zebra crossing on a two-lane arterial road. Every second a radar gun, hidden at the road side, sent the speed data to a lap-top computer in which the observer could also register pedestrians’ arrival at, and start from the curb. Simultaneous video recordings were made in order to obtain a more detailed description of the interaction between the car and the pedestrian. Speed behaviour in encounters (148 observations), non-encounters with pedestrian presence (642 observations) and situations without pedestrian presence (690 observations) was compared. Situations with pedestrian priority were classified. The results show that the frequency of giving way is 5%. Drivers do not observe the law concerning speed behaviour at the zebra crossing, as they do not “adapt the speed in such way that they do not endanger pedestrians who are already on, or are about to step onto the zebra crossing”. In encounters, 3 out of 4 drivers maintain the same speed or accelerate and only 1 out of 4 slows down or brakes. These results indicate that maintained high speed (even exceeding the speed limit of 50 km/h) is the signal from the drivers that they do not intend to give way to the pedestrian at the zebra crossing. The conclusion is that encounters between cars and pedestrians at the zebra crossing are critical situations in which the driver has to be influenced before he reaches the decision zone at 50 to 40 m before the zebra crossing in order to prevent the “signalling by speed” behaviour. Countermeasures to improve driver behaviour at the zebra crossing are discussed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Driver speed behaviour, Zebra crossing, Countermeasures., Encounters, Pedestrian priority, Conflicts
in
Accident Analysis and Prevention
volume
30
issue
6
pages
731 - 743
publisher
Elsevier
external identifiers
  • Scopus:0032199524
ISSN
1879-2057
language
English
LU publication?
yes
id
931f219c-c4c9-4070-b298-c6391af32688 (old id 769241)
date added to LUP
2009-02-17 11:33:11
date last changed
2016-11-20 04:25:46
@misc{931f219c-c4c9-4070-b298-c6391af32688,
  abstract     = {The purpose of the study was to (1) observe the frequency of giving way to pedestrians at the zebra crossing, (2) reveal speed adaptation problems, (3) examine if the time difference between the arrival of the pedestrian and the car have any influence on the speed of the approaching car, (4) identify so-called “ideal” situations (in which the car brakes on the driver’s own initiative in order to give way to a pedestrian) upon which recommendations can be given for implementing means to improve speed behaviour at zebra crossings. It was hypothesised that the speed behaviour of drivers approaching the zebra crossing depends on the pedestrian’s arrival at the curb related to the car’s expected arrival at the zebra crossing. The speed was measured on randomly selected “free” passenger cars which approached a non-signalised mid-block zebra crossing on a two-lane arterial road. Every second a radar gun, hidden at the road side, sent the speed data to a lap-top computer in which the observer could also register pedestrians’ arrival at, and start from the curb. Simultaneous video recordings were made in order to obtain a more detailed description of the interaction between the car and the pedestrian. Speed behaviour in encounters (148 observations), non-encounters with pedestrian presence (642 observations) and situations without pedestrian presence (690 observations) was compared. Situations with pedestrian priority were classified. The results show that the frequency of giving way is 5%. Drivers do not observe the law concerning speed behaviour at the zebra crossing, as they do not “adapt the speed in such way that they do not endanger pedestrians who are already on, or are about to step onto the zebra crossing”. In encounters, 3 out of 4 drivers maintain the same speed or accelerate and only 1 out of 4 slows down or brakes. These results indicate that maintained high speed (even exceeding the speed limit of 50 km/h) is the signal from the drivers that they do not intend to give way to the pedestrian at the zebra crossing. The conclusion is that encounters between cars and pedestrians at the zebra crossing are critical situations in which the driver has to be influenced before he reaches the decision zone at 50 to 40 m before the zebra crossing in order to prevent the “signalling by speed” behaviour. Countermeasures to improve driver behaviour at the zebra crossing are discussed.},
  author       = {Varhelyi, Andras},
  issn         = {1879-2057},
  keyword      = {Driver speed behaviour,Zebra crossing,Countermeasures.,Encounters,Pedestrian priority,Conflicts},
  language     = {eng},
  number       = {6},
  pages        = {731--743},
  publisher    = {ARRAY(0x94563b0)},
  series       = {Accident Analysis and Prevention},
  title        = {Drivers’ speed behaviour at a Zebra Crossing: a case study},
  volume       = {30},
  year         = {1998},
}