Welchen Weg nimmt die „Straße der Zukunft“? – Digitalisierung der Straße im Sonderforschungsbereich/Transregio 339 „Digitaler Zwilling Straße“/Which route takes the “Road of the Future”? – Digitalization of the road within the Collaborative Research Center/ Transregio 339 „Digital Twin of the Road System“

Die Mobilität von Menschen und Gütern ist ein wesentlicher Stützpfeiler einer funktionierenden Gesellschaft und Grundlage einer leistungsfähigen Wirtschaft. Die Mobilität im Bereich des Straßenverkehrs ist in ihrer derzeitigen Form mit enormen Herausforderungen auf globaler Ebene konfrontiert (Dauerhaftigkeit, Sicherheit, Effizienz, Ökologie, Kosten, Automatisierung etc.). Im Sonderforschungsbereich/Transregio 339, der von der Deutschen Forschungsgemeinschaft seit Januar 2022 gefördert wird, forschen mehrere Institute der TU Dresden und der RWTH Aachen (Bauwesen-Informatik-Gesellschaft) an einem räumlich wie zeitlich mehrdimensionalen, digitalen Abbild (Realitätsmodell in Raum und Zeit) aus Fahrzeug, Reifen und Fahrbahn. Das Realitätsmodell „Digitaler Zwilling Straße“ ist gekennzeichnet durch die intelligente Verknüpfung aller relevanten Informationen über das System „Straße der Zukunft“, einschließlich physikalischer Materialuntersuchungen, numerischer Simulationen sowie informatorischer und verkehrlicher Daten (Sensordaten, Datenmodelle etc.).

The urban hinterland

The Roman roads radiating from London attracted a series of roadside settlements, suitably distanced to have been stopping points after a day’s slow travel by ox-drawn cart and for cattle drovers. These were also places from which local estates might have been managed and where taxes could be raised at the intersection between urban and rural economies. Whilst the outlines of this road system and settlement network were Claudio-Neronian in origin, it was significantly enhanced in the Flavian period. Several important suburban villas were also established along the banks of the Thames at this time, although the wider landscape contains surprisingly few Roman villas. This was perhaps because of the relative unimportance of local land-ownership to the formation of power within the early town.

Multi-Criteria Analysis of a People-Oriented Urban Pedestrian Road System Using an Integrated Fuzzy AHP and DEA Approach: A Case Study in Harbin, China

Increasingly, cities worldwide are striving for green travel and slow traffic, and vigorously developing people-oriented urban pedestrian traffic with sustainability has become a fixture in recent discourse. This paper comprehensively considers the sidewalk’s facilities environment and the status of pedestrian traffic flow; divides the urban pedestrian road system (UPRS) into five subsystems around the underpass, overpass, crosswalk, sidewalk, and road crosswalk; and introduces the basic structure as well as the function of each system. Then, the indicators are classified into two types of crosswalk facilities and sidewalk facilities, and a comprehensive pedestrian road indicator system with the combination of subjective and objective is established. Consequently, the integration of the fuzzy AHP and DEA-based symmetrical technique for the subjective evaluation indicator combined with pedestrian traffic characteristics is developed. A nine-step semantics scale of relative importance was used so that the symmetry of the response of pedestrian satisfaction was maintained. Fuzzy evaluation based on AHP is further modeled, and the DEA is employed to achieve an overall evaluation of the quality of service (QoS) for UPRS. The applicability of the established evaluation system is finally verified through a real case study in Harbin, China. The serviceability assessment method in this paper provides a new idea for planners to conduct sustainability evaluation for UPRS in future urban renewal development.

Modal analysis and dynamic shimmy behavior of vehicle–road system

To analyze the influence of the road roughness excitation on vehicle shimmy, a 12 degrees-of-freedom dynamic model of vehicle–road system is developed. The Hopf bifurcation theory is used to study the system stability. On this basis, the natural frequency and modal properties of the vehicle system are elaborated. It can be found that the roll mode plays a crucial role in the vehicle stability. Then, the dynamic shimmy behavior exposed to the sinusoidal and random road roughness excitations is investigated with the help of the modal analysis and the largest Lyapunov exponent. Furthermore, the numerical results are verified through the measurement results, and the influence of the front wheel track on vehicle shimmy is also examined. The results show that the decrease of the front wheel track is an effective way to attenuate vehicle shimmy for different road roughness excitations.

ANÁLISE DE DUPLICAÇÃO DO TRECHO RODOVIÁRIO DA BR-101/RJ

Brazil is in a situation of marked degradation in the road system, both in the sense of lacking new road projects and needing repairs to its current infrastructure. It is known that with the demographic increase over the years several positive and negative environmental impacts were caused and that the highways are works that generate great environmental impact. An environmental impact is defined as any change caused to the environment by humans, in turn the negative leads to an ecological imbalance, causing serious damage to the environment. In addition to the great polluting effects of the gases released by car exhaust, there is also the impact of road construction, which implies the withdrawal and transfer of huge amounts of land, deforestation, changes in the form of water runoff, silting of rivers and associated urban expansion. The purpose of this article is to analyze the fundamentals that support the concept, understand the challenges posed and the level of adequacy that reveal the need for legitimacy of the article.