This study evaluates traffic reactions to two alternative construction plans of Lafayette Bridge crossing the Mississippi River in downtown Saint Paul, Minnesota. We calibrate a travel demand model previously developed and evaluate network performance in different construction phases of the two alternative scenarios. Most significant changes in traffic condition occur during the bridge closure ...

Allison Campolo, Monica Crary* and Paul Shannon Author Affiliations Alcon Research, LLC, Fort Worth, USA Received: April 18, 2022 | Published: July 05, Corresponding author: Crary, Texas, 6201 South Freeway, DOI: 10.26717/BJSTR.2022.45.007130

When freeway traffic flow approaches capacity, minor disturbances or perturbations can cause unstable traffic streams to break down into queued or bottleneck conditions with the accompanying heavy congestion costs. As the traffic volume at which flow breaks down is uncertain, this research utilizes a stochastic capacity model to estimate congestion costs in terms of delays, fuel, and emissions....

In Akamatsu and Heydecker (2003), we presented a necessary and sufficient condition for the occurrence of capacity paradoxes in general saturated networks, in which there is a queue on each link. The present paper extends that analysis to the more usual case of non-saturated networks, in which there are queues on some links but not on others. First we formulate dynamic user equilibrium (DUE) as...

This study presents a surrogate approach for safety analysis of freeway facilities using automated trajectory collection and behavioural analysis from surrogate measures of safety (in particular time to collision). This methodology is proposed as a potential alternative or complement to the classical approach based on historical accident data, particularly suited for evaluating the microscopic ...

1 The procedures detailed in the Highway Capacity Manual (HCM 2010) estimate capacity and 2 several operational measures dictating level of service for freeway facilities and surface streets. 3 However, these methods do not consider cases in which spillback occurs from one facility type 4 to another. The queueing effects in oversaturated conditions as they propagate upstream – onto a 5 freeway ...

This article models the interaction between freeway traffic dynamics and capacity-reducing incidents as a stochastic switched system, and analyzes its long-time properties. Incident events on a multi-cell freeway are modeled by a Poisson-like stochastic process. Randomness in the occurrence and clearance of incidents results in traffic dynamics that switch between a set of incident modes (discr...

In this paper, a new methodology is presented for real-time detection and characterization of freeway incidents. The proposed technology is capable of detecting freeway incidents in real time as well as characterizing incidents in terms of time-varying lane-changing fractions and queue lengths in blocked lanes, the lanes blocked due to incidents, and duration of incident, etc. The architecture ...

Title of Dissertation: A ROBUST MODEL FOR ESTIMATING FREEWAY DYNAMIC ORIGIN-DESTINATION MATRICES Pei-Wei Lin, Doctor of Philosophy, 2006 Dissertation directed by: Professor Gang-Len Chang Department of Civil and Environmental Engineering The purpose of this study is to develop an effective model and algorithm for estimating dynamic Origin-Destination demands for freeways. The primary challenge ...