6 papers
Safe and Operationally Efficient Longitudinal Control of Autonomous Truck Platoons
Alexander Hammerl, Ravi Seshadri, Thomas Kjær Rasmussen +1
This paper presents a hierarchical longitudinal control architecture for autonomous truck platoons that jointly addresses safety, string stability, and economic efficiency. The fra…
Improving Travel Time Reliability with Variable Speed Limits
Alexander Hammerl, Ravi Seshadri, Thomas Kjær Rasmussen +1
This paper analyzes the use of variable speed limits to optimize travel time reliability for commuters. The investigation focuses on a traffic corridor with a bottleneck subject to…
Travel Time Reliability in Stochastic Kinematic Flow Models
Alexander Hammerl, Ravi Seshadri, Thomas Kjær Rasmussen +1
This paper analyzes the time-dependent relationship between the mean and variance of travel time on a single corridor under rush hour like congestion patterns. To model this phenom…
Risk Aware Reservoir Control For Safer Urban Traffic Networks
Alexander Hammerl, Wenlong Jin, Ravi Seshadri +2
We present a risk-aware perimeter-style controller that couples safety and efficiency targets in large, heterogeneous urban traffic networks. The network is compressed into two int…
Using Model Predictive Control To Reduce Traffic Emissions on Urban Freeways
Alexander Hammerl, Ravi Seshadri, Thomas Kjær Rasmussen +1
Urban traffic congestion significantly impacts regional air quality and contributes substantially to pollutant emissions. Suburban freeway corridors are a major source of traffic-r…
Hysteresis Behind A Freeway Bottleneck With Location-Dependent Capacity
Alexander Hammerl, Ravi Seshadri, Thomas Kjær Rasmussen +1
Macroscopic fundamental diagrams (MFDs) and related network traffic dynamics models have received both theoretical support and empirical validation with the emergence of new data c…