NHTSA - Effectiveness of the Ohio Vehicle Action and Administrative License Suspension Laws  
   A study from the National Highway Traffic Safety Association discussing the both the positive and negative effects of Ohio's license suspension laws.
   http://www.nhtsa.dot.gov/people/injury/research/ohio/toc.html

NHTSA - Extent of Driving While Suspended for Alcohol-Impaired Driving  
   Looks at Wisconsin and New Jersey's different administrative license revocation laws and discusses their impact on repeat offenses.
   http://www.nhtsa.dot.gov/people/injury/research/observation_study/abstract.htm

MADD - Administrative License Revocation - Issue Brief  
   A summary of the statistics and science behind MADD's support of administrative license revocation/suspension (ALR) laws.
   http://www.madd.org/activism/0,1056,7586,00.html

California DMV License Suspensions  
   Explanation of typical (California) administrative license suspension laws and hearings, from the attorney who wrote the national textbook "Drunk Driving Defense, 5th edition".
   http://www.duicentral.com/drivers_license_suspension/