scholarly journals Possibility of Microsimulation Models Calibration – Case Study in the City of Split

1970 ◽  
Vol 24 (3) ◽  
pp. 231-241
Author(s):  
Dražen Cvitanić ◽  
Deana Breški ◽  
Ivan Lovrić
Keyword(s):  
Dynamic Traffic Assignment ◽  
Simulation Models ◽  
Traffic Signals ◽  
Flow Speed ◽  
Good Prediction ◽  
Free Flow Speed ◽  
Microsimulation Models ◽  
The City ◽  
Made In

The paper presents a comparison of the possibility and complexity of the calibration process of two microsimulation models. The first model CORSIM is simple for use while the second named S-Paramics is more complex software. For research purposes, a model of street network with defined geometry (number, width and purpose of lanes) has been made. The volume and distribution of traffic as well as the data about traffic signals were input in the models. Numerous simulations were performed, first with the default parameters of models, and then with the calibrated parameters. Both programs have resulted in very good prediction of the intersection capacity and discharge volumes. However, for the calibration of speed more time and effort have been made in S-Paramics in which the average speed may be higher than the defined free-flow speed. This can present a problem in determining the level of service and comparing the S-Paramics results with other simulation models and analytical method results. On the other hand S-Paramics has greater capabilities than CORSIM (roundabouts modelling, dynamic traffic assignment, opportunity to interact with traffic signals...). Thus, for each specific task, one should carefully choose an appropriate program which would result in necessary and reliable output data with minimum effort and time consumed.

scholarly journals Freeway Free Flow Speed: a Case Study in Italy

2012 ◽  
Vol 54 ◽  
pp. 628-636 ◽  
Author(s):  
Mario De Luca ◽  
Renato Lamberti ◽  
Gianluca Dell’Acqua
Keyword(s):  
Flow Speed ◽  
Free Flow ◽  
Free Flow Speed

Evaluating the Operational Efficiency of Two Versions of Super Diverging Diamond Interchange Design: A Case Study in Denver, Colorado

2021 ◽  
pp. 036119812110372
Author(s):  
Muhammad Tahmidul Haq ◽  
Amirarsalan Mehrara Molan ◽  
Khaled Ksaibati
Keyword(s):  
Research Effort ◽  
Traffic Signals ◽  
Operational Efficiency ◽  
Traffic Demand ◽  
Operational Analysis ◽  
Signal Coordination ◽  
Traffic Volumes ◽  
Microsimulation Models ◽  
Better Than

This paper aims to advance the current research on the new super diverging diamond interchange (super DDI) design by evaluating the operational efficiency using real-world locations. As part of a comprehensive research effort on improving the performance of failing service interchanges in the mountain-plains region, the study identified three interchanges (Interstate 225 and Mississippi Avenue, Interstate 25 and 120th Avenue, and Interstate 25 and Hampden Avenue) at Denver, Colorado as the potential candidates to model for future retrofit. Four interchange designs (i.e., existing CDI [conventional diamond interchange], DDI, super DDI-1, and super DDI-2) were tested in this study. The operational analysis was conducted using VISSIM and Synchro. Several microsimulation models (120 scenarios with 600 runs in total) were created with three peak hours (a.m., noon, and p.m.) for existing (the year 2020) and projected (the year 2030) traffic volumes. The study considered two simulation networks: (1) when no adjacent traffic signal exists, to determine how the four interchange designs would perform if there were no adjacent signals or they were far away from the interchange; and (2) when there are two adjacent traffic signals, to evaluate the performance of the four interchanges in a bigger corridor with signal coordination needed. An important finding is that super DDI designs outperformed DDI with adjacent signals and higher traffic demand, while DDI performed similarly to or sometimes insignificantly better than super DDI if no adjacent intersections were located in the vicinity and if the demand was lower than the DDI’s capacity.

scholarly journals The cost of building for the future: the reconciliation of sustainable housing issues in Toronto

2021 ◽  
Author(s):  
Paul Adam Erlichman.
Keyword(s):  
Urban Context ◽  
Public And Private ◽  
Sustainable Housing ◽  
Green Housing ◽  
The Future ◽  
Private Housing ◽  
The Cost ◽  
The City ◽  
Made In

Although some green housing elements have become more commonplace in residential renovations in Canada, the undertaking of complete green retrofits is relatively uncommon. This paper explores the barriers to green retrofits, such as affordability and bureaucracy, in the urban context of the City of Toronto. The research was informed by one main case study, one supplementary case study, and six interviews with sustainable housing experts. The research has yielded nine recommendations that are directed towards three levels of government and related public and private housing organizations. These recommendations have been made in the hopes of making sustainable housing more ubiquitous in Toronto.

scholarly journals The cost of building for the future: the reconciliation of sustainable housing issues in Toronto

2021 ◽  
Author(s):  
Paul Adam Erlichman.
Keyword(s):  
Urban Context ◽  
Public And Private ◽  
Sustainable Housing ◽  
Green Housing ◽  
The Future ◽  
Private Housing ◽  
The Cost ◽  
The City ◽  
Made In

Although some green housing elements have become more commonplace in residential renovations in Canada, the undertaking of complete green retrofits is relatively uncommon. This paper explores the barriers to green retrofits, such as affordability and bureaucracy, in the urban context of the City of Toronto. The research was informed by one main case study, one supplementary case study, and six interviews with sustainable housing experts. The research has yielded nine recommendations that are directed towards three levels of government and related public and private housing organizations. These recommendations have been made in the hopes of making sustainable housing more ubiquitous in Toronto.

Traffic Platoon Dispersion Modeling on Arterial Streets

1996 ◽  
Vol 1566 (1) ◽  
pp. 49-53 ◽  
Author(s):  
Abdelaziz Manar ◽  
Karsten G. Baass
Keyword(s):  
Simulation Models ◽  
Traffic Signals ◽  
External Friction ◽  
Dispersion Modeling ◽  
Arterial Streets ◽  
Signal Coordination ◽  
Traffic Volumes ◽  
Platoon Dispersion ◽  
The City ◽  
Maximal Capacity

Platoon dispersion is a key element in traffic simulation models designed to measure arrivals at traffic signals. One of the most popular models is contained in the TRANSYT program. In this program, dispersion is defined by the platoon dispersion factor, which is given for three types of conditions in relation to external friction. This study demonstrates that platoon dispersion depends not only on external friction but also on internal friction between vehicles in the platoon. As volumes and densities increase, platoon dispersion increases up to a maximum, which is attained at half the capacity. As volumes and densities increase further, dispersion decreases and reaches a minimum value at volumes around maximal capacity. Experimental analysis on eight arterial sites in the city of Montreal (Quebec, Canada) has confirmed this relationship between dispersion and traffic volumes. Mathematical models (having a parabolic shape) relating platoon dispersion to internal and external friction were developed for three different categories of arterial streets representing low, moderate, and heavy friction levels. These models could be introduced into signal coordination programs and could contribute to a better simulation of arriving platoons at intersections as volumes change in relation to time.

Mapping of soil ecological properties in the industrial city of Usolye-Sibirskoe

2021 ◽  
Vol 968 (2) ◽  
pp. 23-28
Author(s):  
E.V. Naprasnikova ◽  
A.A. Sorokovoj
Keyword(s):  
Close Correlation ◽  
Large Area ◽  
Biochemical Activity ◽  
Industrial City ◽  
Biochemical Status ◽  
High Level ◽  
The City ◽  
Made In ◽  
Urban Territory

Results from studying urbanized territories highly depend on approaches and methods of interpreting data obtained in the course of investigations. A case study was made in the industrial city of Usolye-Sibirskoe (Irkutsk oblast, RF) to investigate and map the current ecological-and-biochemical status of soil cover affected by urbanization and technogenesis. T. V. Aristovskaya’s and M. V. Chugunova’s rapid method was used to reveal high indicators of the level of alkaline-acid conditions and biochemical activity of urban soils. The mapping enabled identification of the local features of the urban territory. A considerable part of it is occupied by soils with weak alkaline pH index (7.3–8.0). In absolute values, it is 6083.3 ha, or 77.2 %. The study determined a high and very high level of the soil biochemical activity. They occupy a large area of 6079.2 ha, i.e. 76 % of the city. A substantial increase in soil biochemical activity can lead to loss of a biogenous element, nitrogen, and this cannot be regarded as a positive phenomenon. Experimental data on the SBA – рН system for the residential zone of the city made it possible to determine a close correlation between them to be statistically significant.

The celebration, condemnation and reinterpretation of the Geddes plan, 1925: the dynamic planning history of Tel Aviv

Urban History ◽  
2012 ◽  
Vol 40 (1) ◽  
pp. 114-135 ◽  
Author(s):  
NOAH HYSLER RUBIN
Keyword(s):  
Urban Planning ◽  
Urban History ◽  
Architectural Heritage ◽  
Planning History ◽  
Main Claim ◽  
Tel Aviv ◽  
History Of ◽  
The City ◽  
Made In

ABSTRACT:The article presents the short urban history of Tel Aviv as a case-study for critical readings in urban planning. Focusing on Patrick Geddes’ celebrated plan for the city (1925) and its various interpretations along the years, the main claim made in the article is that when present planners are confronted with a past which does not suit current needs, history is contested, or reinvented entirely. The appreciation of Geddes’ plan over the years always reflected the city's contemporary image and its planners’ attitudes, which initially reflected the pioneering spirits of the city's Zionist creation. The plan was later blamed for the city's deterioration; and finally celebrated again, alongside the city's new found architectural heritage and urban spirit.

scholarly journals Reconciling Energy and Heritage: Retrofit of Heritage Buildings in Contexts of Energy Vulnerability

2019 ◽  
Vol 11 (3) ◽  
pp. 823 ◽  
Author(s):  
María Piderit ◽  
Susan Agurto ◽  
Laura Marín-Restrepo
Keyword(s):  
Low Income ◽  
Residential Building ◽  
Energy Performance ◽  
Intervention Plan ◽  
Heritage Buildings ◽  
Systematic Identification ◽  
The City ◽  
Energy Aspects ◽  
Made In

Chile is a resilient country which has been struck by a series of natural disasters, affecting heritage areas whose inhabitants live under a great economic and energy vulnerability. Although there are some advances that have been made in the country to recover its heritage, these do not include energy efficiency parameters. In this context, intervention in heritage properties requires a specific, complementary treatment above and beyond what is currently applied. Consequently, this research aims to develop a methodology that balances heritage and energy in energy vulnerability contexts. The proposed methodology analyzes heritage and energy aspects separately through attribute matrices, as well as the building pathologies, to later integrate the results in a final matrix which allows defining an energy-heritage intervention plan. In this way, it includes the systematic identification of elements that require intervention because of pathological issues, as well as the type of intervention that would be acceptable given its heritage significance and whether they mean a possibility to optimize the energy performance. The methodology, for its validation, was applied in a heritage residential building inhabited by low-income occupants. The case study presents physical damages and is located in the city of Lota, an area with an outstanding cultural heritage from the mining era.

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