This research simulates and quantifies the efficiency of a connected and automated vehicle preemption system under varying operating conditions using an agent-based simulation model of the El Paso highway network. Simulation activities assess emergency medical services vehicle travel times from selected fire stations to multiple incident locations along the highway system. Mobility efficiency is defined as the percentage reduction in average travel time, with simulated travel times extracted and analyzed across scenarios. Analysis examines the effects of broadcast range, connected and automated vehicle market penetration, non-connected vehicle compliance rates, and traffic volume on emergency vehicle travel performance.