Seit über 50 Jahren beschäftigt sich die Wissenschaft ernsthaft mit dem Thema ”Stau”. Ob Fahrzeuge, Menschen, Tiere oder Mikroben, überall wo sich viele ähnliche Objekte zur selben Zeit am selben Ort in dieselbe Richtung bewegen wollen, tritt er auf. Oft ohne erkennbaren Grund und plötzlich (”Stau aus dem Nichts”). In der Zwischenzeit sind manche Rätsel geklärt, einiges aber bleibt auch weiterh...

In this paper a bimodal discrete urban road network design problem with bus and car modes is investigated. The problem consists of decision making for lane addition to the existing streets, new street constructions, converting some two-way streets to one-way streets, lane allocation for two-way streets, and the allocation of some street lanes for exclusive bus lanes. Two objectives are consider...

Scientific literature lacks a model which combines exposure to risk, risk, and the relationship between them. This paper presents a conceptual road safety framework comprising mutually interacting factors for exposure to risk resulting from travel behaviour (volumes, modal split, and distribution of traffic over time and space) and for risk (crash and injury risk). The framework's three determi...

This paper presents a pilot study of the development and evaluation of a traffic signal timing control for a smallscale road network in downtown Duluth, Minnesota. The study mainly focuses on the alleviation of a sudden traffic flow surge following special events (e.g., concerts, conventions, hockey games, etc.) held at the city’s Entertainment and Convention Center. A practical approach for si...