Factors in differential safety performance across different income levels

Download
Luana Ozelim
Samwel Zephaniah
Emmanuel Kofi Adanu
Randy Smith
Steven Jones

Roadway safety has been explored numerous times as an effort to identify problems and implement countermeasures to improve conditions. A clear understanding of the causes of crashes is not yet available; therefore, factors that may be related to crash occurrence are analyzed. Prior studies most often focus on the physical design characteristics of the transportation infrastructure, vehicle characteristics and exposure as factors influencing crash frequency and severity. Socio-demographic characteristics are considered in a few studies, but they are typically limited to gender, age, and race or ethnicity. This study builds upon previous studies and explores factors related to vehicle characteristics, physical infrastructure, and environmental conditions all in a socio-demographic and cultural context, as explanatory factors for differential crash frequency and severity across regions. Data from 2009 to 2013 for each county in Alabama are evaluated in this analysis. Three groups of study are identified based on income level: low, medium, and high income levels, and analyzed in relation to crash rates and fatality rates. Results of the analysis show that the low income group has lower crash rates than the higher income group, but the low income group has higher fatality rates than the higher income group. This study applies charts and GIS maps to evaluate the extent to which characteristics such as age, race, gender, driver license status, employment status, alcohol test results, speed at impact, safety equipment, lighting conditions, road surface type, environmental contributing circumstances, curvature and grade, primary contributing circumstance, EMS response delay, police arrival delay, health insurance coverage, and educational level might explain the differential safety performance between income levels. This study is a description of safety in Alabama counties and provides information to create research questions related to the topic; the authors understand that the results are not developed at the level to implement policies and data should be further analyzed in the future through statistical methods.

MEET US


6
Oct

Open seminar with Mistra SAMS international scientific advisory...

Mistra SAMS international scientific advisory panel (ISAP) is visiting Stockholm, and the program will host an open seminar where the panel members will give talks in their area of expertise.
19-20
Oct

ERPUG 2017

The five year anniversary of  European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017. 

LATEST NEWS


2017-07-05

Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


2017-06-29

Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017. 


2017-05-30

Crash testing bicycles at VTI

For the first time single bicycle crashes have been simulated at the VTI crash safety laboratory.


2017-05-15

A case study exploring firefighters’ and municipal officials’ preparedness for electrical vehicles

A VTI-study presents a social perspective on new vehicle technology. It explores the self-reported preparedness of the fire departments (i.e., rescue services) in Sweden’s three largest cities regarding rescue operations involving electrical vehicles (EVs).


2017-05-02

Pioneering research on and about bicycles at VTI

Under what circumstances might cyclists lose tyre grip? What actions could then be taken to prevent a crash? VTI is currently developing a theoretical model of the behaviour of bicycle tyres during braking and steering in different situations and on different...


2017-05-02

Virtual pedestrians create efficient stations

If more people are to choose sustainable travel, then the public transport stations of the future must be designed so that pedestrians can get where they are going quickly, without congestion or queues. The Swedish Road and Transport Research Institute (VTI)...