Ramp meters in the Twin Cities have been the subject of a recent test of their effectiveness, involving turning them off for eight weeks. This paper analyzes the results with and without ramp metering for several representative freeways during the afternoon peak period. Seven performance...

This paper develops an analytical framework for ramp metering, under which various ramp control strategies can be viewed as ramifications of the same most-efficient control logic with different threshold values, control methods, and equity considerations. The most-efficient control logic only...

This study aimed to estimate the cost-effectiveness and returns on investments of HIV prevention programs implemented during 2006-2010 and to identify the optimal allocation of resources across combinations of programs for an effective HIV prevention response to inform the prioritization of...