Evaluation of eleven local alcohol program enforcement components in Illinois /

"June 1998."

Evaluation of five Local Alcohol Program enforcement components in Illinois /

An evaluation of five of the eleven Local Alcohol Program projects funded in FY98 based on the following criteria: patrol hours; traffic contact rate (citation/written warnings); DUI arrest rate; alcohol-related contact rate; DUI processing rate; occupant restraint percent distribution.

Evaluation of the 2006 Illinois "Click It or Ticket" Campaign, April 24-June 18, 2006 /

Evaluates the impact of the "Click It or Ticket" campaign (May 2006) by using statewide public opinion and observational surveys of licensed Illinois drivers.

Evaluation of the 2006 Thanksgiving Click It or Ticket Campaign in Illinois, November 6 - December 10, 2006 /

Evaluates the impact of the "Click It or Ticket" campaign (April 2007) by using statewide public opinion and observational surveys of licensed Illinois drivers.

Evaluation of aerial patrol of interstate highways by the Illinois State police /

"April 1980."

Motorist awareness and opinion survey on safety belt issues during the "click it or ticket" campaign in Illinois /

"June 2002 survey results"

Safety belt usage in Illinois : observational survey results /

Report provides a descriptive analysis of safety belt usage in Illinois. The survey was a statistical (multi-stage random) observational survey conducted statewide during ... on both high volume state highways and low volume local roads and residential streets. The survey provided a statistically representative sample of the state as a whole.

Empirical Bayes method in the study of traffic safety via heterogeneous negative multinomial model

In the study of traffic safety, expected crash frequencies across sites are generally estimated via the negative binomial model, assuming time invariant safety. Since the time invariant safety assumption may be invalid, Hauer (1997) proposed a modified empirical Bayes (EB) method. Despite the modification, no attempts have been made to examine the generalisable form of the marginal distribution resulting from the modified EB framework. Because the hyper-parameters needed to apply the modified EB method are not readily available, an assessment is lacking on how accurately the modified EB method estimates safety in the presence of the time variant safety and regression-to-the-mean (RTM) effects. This study derives the closed form marginal distribution, and reveals that the marginal distribution in the modified EB method is equivalent to the negative multinomial (NM) distribution, which is essentially the same as the likelihood function used in the random effects Poisson model. As a result, this study shows that the gamma posterior distribution from the multivariate Poisson-gamma mixture can be estimated using the NM model or the random effects Poisson model. This study also shows that the estimation errors from the modified EB method are systematically smaller than those from the comparison group method by simultaneously accounting for the RTM and time variant safety effects. Hence, the modified EB method via the NM model is a generalisable method for estimating safety in the presence of the time variant safety and the RTM effects.

A summary review of traffic safety problems and programs through June 1973.

Mode of access: Internet.

A summary review of traffic safety highlights, problems and programs. June 1974 through June 1975.

Mode of access: Internet.

A summary review of the status of traffic safety, problems, priorities, programs and of NHTSA activities June 1975 through September 1976.

Mode of access: Internet.

The effectiveness of traffic safety material in influencing the driving performance of the general driving population. Final report.

Federal Highway Administration, Washington, D.C.

Newsletter University of Illinois Division of University Extenstion.

Mode of access: Internet.

Ashland Flood Control Project : Village of Ashland, Cass County Illinois : Division of Water Resources, small projects program.

"DOWR/SPR/95-002."