The Impact of Adopting Time-of-Day Tolling: Case Study of 183A in Austin, Texas evaluates the traffic and revenue effects of moving from a fixed toll rate on the 183A Turnpike in Texas to a toll structure that varies by time of day. To conduct the analysis, RAND administered a stated preference survey and developed discrete choice models to understand how motorists are likely to respond to alternative tolling arrangements. The analysis suggests that shifting to time-of-day tolling on 183A is not likely to meet the tolling authority's objectives of reducing congestion downstream in the transportation network, given other constraints facing the toll road operator.