Joshua Lawrence Traub

The Transportation Worker Identification Credential (TWIC) is designed to enhance security at U.S. ports. It demonstrates that the holder has passed a Transportation Security Administration security threat assessment and is required of anyone with unescorted access to a secure area at a regulated facility. This report provides the findings from an assessment of the TWIC program, along with the assessors' recommendations.

In this report, researchers explore measurement methods to assess how information-sharing affects criminal justice outcomes and how the practicalities of law enforcement work practices can affect measurement. In addition, the authors offer lessons for future policy evaluation and information system design.