title: Antilock braking system effectiveness in prevention of road traffic crashes in Iran.
abstract: BACKGROUND
  Anti-lock Brake System (ABS) helps the equipped vehicles to stop under heavy braking, in a shorter distance and with a better control of direction. It was expected that this technology will reduce the rate of fatal road traffic crashes (RTC); however, the outcome is controversial in the real world. The aim of this study is to compare the claimed annual incidence rate and financial losses due to RTCs in ABS vs. non-ABS personal vehicles in Iran.
  
  
  METHODS
  A telephone survey among drivers of two similar models of personal vehicles was arranged. The studied vehicles were of the same brand and type; but only one of them was equipped with ABS. The number of RTCs, subsequent financial loss, and drivers' knowledge and perception about ABS were sought. The sample consisted of drivers of 1232 ABS and 3123 non-ABS vehicles.
  
  
  RESULTS
  The annual incidence rate of RTC involving another vehicle was 145.1 (134.8-155.9) per 1000 vehicle-years and there was not a statistically significant difference between study groups.The incidence of RTC with another vehicle due to brake failure was 50.3 (42.9-58.5) for 1000 non ABS vehicle-years and 30.0 (21.2-41.2) for 1000 ABS equipped vehicle-years. The difference was statistically significant after adjustment for the driver and vehicle's age and the daily driving time. The attributable risk of RTC for non-ABS vehicles was 20/1000 vehicles and the excess fraction was 39.8%. The mean financial loss due to reported RTCs was $987.9 ± $1547.3 US Dollars and there was not a statistically significant difference between study groups. While 61.1% of ABS vehicle drivers reported situations in which they believed the ABS had prevented a crash, 44.1% of them however, they did not know how to use ABS efficiently.
  
  
  CONCLUSIONS
  Law enforcement to maintain safe distance and adhere to speed limit while driving, is needed to raise the effectiveness of ABS. This is as necessary as considering mandatory outfitting of ABS. Safety authorities should first consider the global experience and local evidence, before adopting any specific policy in this regard. The drivers need to learn the right way to use ABS for maximum effectiveness.
authors: Social Determinants of Health Research Center, Urmia University of Medical Sciences, Urmia, Iran.
authors: Davoud
authors: D
authors: Khorasani-Zavareh
authors: Saeed
authors: S
authors: Shoar
authors: Soheil
authors: S
authors: Saadat
mesh_terms: D000063:Accidents, Traffic / Q000191:economics / Q000517:prevention & control* / Q000706:statistics & numerical data; D000328:Adult; D001334:Automobile Driving; D004868:Equipment Failure / Q000191:economics* / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D015994:Incidence; D007492:Iran / Q000453:epidemiology; D008297:Male; D055595:Mechanical Phenomena; D008875:Middle Aged; D018986:Motor Vehicles / Q000592:standards*; D012449:Safety / Q000592:standards*; D011795:Surveys and Questionnaires; D013689:Telephone; D014195:Travel / Q000523:psychology / Q000706:statistics & numerical data
references: Public Health. 2004 Mar;118(2):110-3
references: 15037040
references: BMC Emerg Med. 2009 May 12;9:8
references: 19435521
references: Accid Anal Prev. 1997 Jan;29(1):97-108
references: 9110044
references: BMC Public Health. 2009 Dec 23;9:486
references: 20030826
references: BMC Public Health. 2010 Oct 23;10:639
references: 20969795
references: BMC Public Health. 2011 Jun 21;11:488
references: 21693056
references: Chin J Traumatol. 2011 Jun 1;14(3):131-6
references: 21635797
references: Traffic Inj Prev. 2006 Mar;7(1):38-43
references: 16484031
references: Int J Inj Contr Saf Promot. 2008 Mar;15(1):9-17
references: 18344091
references: Accid Anal Prev. 2002 May;34(3):333-41
references: 11939362
references: Accid Anal Prev. 1994 Dec;26(6):807-11
references: 7857495
references: Accid Anal Prev. 1997 Nov;29(6):745-57
references: 9370011
references: Accid Anal Prev. 2006 Jul;38(4):742-7
references: 16533493
references: Accid Anal Prev. 1996 May;28(3):315-23
references: 8799435