Tranxit provides transport planning services ranging from data collection, demand assessment & conceptual design solutions to state-of-the-art traffic audit using micro simulation using VISSIM as modelling platform .
> Problem analysis (surveys & analysis)
> Demand assessment & Projections.
> Planning & Design of transport facilities & infrastructure
> Transport Master Plan/ Area circulation plan / CMP
> Feasibility study for transport infrastructure
> Operations master plan (route, schedule & flow) for bus transit systems, transport terminals & depots
> Intelligent transport- Systems Requirement Specifications
> Traffic Audit using micro-simulation using VISSIM as modelling tool.
With most of the consultancy adhering to the old techniques for transport planning services, we integrate the use state-of-the-art planning tools for adding value into transport planning decisions. This involves use of intelligent systems, modelling & 3D micro simulation.
Why 3D micro-simulation?
Complex mathematical & statistical models are used in the transport planning industry for assessment of any transport project (ranging from a local subway, a city level facility like a bus terminal or a mass transit system like metro or the Bus Rapid Transit). The results from most such models are in form of 'numbers or graphs' which are incomprehensible to a non-technical audience concerned with decision making or other persons related to projects.
A 3D micro simulation is a tool for transport planners to analyze, study and present different dynamics of 'time, number and flow' scenarios through virtual reality. This helps in visualizing many possible scenarios and assess them fairly realistically. This has the potential to help the decision making process by providing an easily comprehensible medium for decision support and visualize any anticipated situation in advance.
WhyVISSIM?
VISSIM is the leading microscopic simulation program for multi-modal traffic flow modelling. With its unique high level of detail it accurately simulates urban and highway traffic, including pedestrians, cyclists and motorized vehicles. Unlike most of the other such software available we believe this is best suited for simulating Indian conditions. It has the ability to analyze traffic & pedestrian flow according to driving/ human behaviour pattern observed! prevalent in India. All possible parameters ranging from driver's response time to vehicle turning geometrics can be configured for each class & type of vehicle considered.
VISSIM is the ideal tool for transportation professionals who want to simulate different traffic scenarios before starting implementation. It thus allows them to find a solution which takes traffic and transportation quality, safety and cost into consideration. Failure scenarios can be visualized much in advance to help strategize system implementations.
As VISSIM combines traffic engineering expertise and state-of-the-art presentation options (even 3D animations), it is not only used by transportation professionals, but more and more decision makers and local authorities are choosing VISSIM to convincingly show how effective a projected measure might be, regardless of whether a new road is going to be constructed or a new tram line is being planned. http://www.ptvag.com/cgi-bin/traffic/traf_vissim.pl
How IT WORKS?
The modelling process required building a base network in 3D. The network can be roads, pavements, rail lines, staircases & ramps with specified 'general' traffic flow direction with 'configurable' embedded rules of signalling, priorities, speed control and direction change. All applicable vehicle classes and types are calibrated for their turning geometries, acceleration-deceleration parameters, driver response times & lateral tolerances. These vehicle sets are then configured to originate at specified points in the network and left to negotiate their respective weaves along their scheduled paths that may be predefined or dynamically generated during the simulation.
Calculations are done every millisecond to ascertain the relative and absolute position of each participating 'mode' based upon the master parameters and individual mode characteristics. The absolute positions are displayed on the screen as a running visual which displays accurately individual and collective flows, movements, stops, starts, congestions & network blockages.
Typical Problem Application Areas
Transport Terminals, manufacturing facilities and building complexes often overlook the 'time, space, number & flow' dynamics of different modes that are required to use the allocated movement space. It is universally being discovered that 'unwarranted' congestions situations arise out of inadequate planning from the 'time, space, number & flow' dynamics perspectives.
India has one of the highest number of 'classes' and 'variants' of vehicles in any class in terms of the size, power, turning angles and movement characteristics. This fact itself makes correct evaluation of spatial needs of a desired flow channel almost impossible without the use of micro-simulation as a decision support tool.
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Geometry Related Congestion:
'Geometry' of available path and corresponding vehicle motion plays a crucial role in enabling smooth flow at peak times. This aspect has never been studied in the traditional processes of infrastructure planning. VIS SIM can be used to analyze geometric design errors (at terminals, building complexes or roadside) in design and display the points of conflicts and inefficient movement paths much in advance. These simulation can be used to validate all 'vehicle flow' designs using VISSIM.
Pulse Congestion:
Large commercial complex with limited entry/exit but enough internal space. Simulations of 'vehicle flows' can ascertain conflict points in case of large commercial complex with restricted entry / exit points and vehicle flow efficacy thereof. As per the standards there could be enough space available for parking of cars inside the complex but due to high arrival rate (in the morning) and high departure rate (in the evening) and limited entry exit point long queue of cars at entry/ exit is a familiar scenario. VISSIM can help analyze such situations with expected traffic volumes and become an excellent decision support tool to validate the design intentions.
Vehicle - Pedestrian Conflicts :
At most modal interchange points, vehicle-pedestrian conflict is a common situation. These situations are needed to be analyzed for finding out capacity of space to accommodate expected volumes. VISSIM provides easy way to visualize such situation at stage well before implementation of a project.
'Geometry' of available path and corresponding vehicle motion plays a crucial role in enabling smooth flow at peak times. This aspect has never been studied in the traditional processes of infrastructure planning. VIS SIM can be used to analyze geometric design errors (at terminals, building complexes or roadside) in design and display the points of conflicts and inefficient movement paths much in advance. These simulation can be used to validate all 'vehicle flow' designs using VISSIM.
Pulse Congestion:
Large commercial complex with limited entry/exit but enough internal space. Simulations of 'vehicle flows' can ascertain conflict points in case of large commercial complex with restricted entry / exit points and vehicle flow efficacy thereof. As per the standards there could be enough space available for parking of cars inside the complex but due to high arrival rate (in the morning) and high departure rate (in the evening) and limited entry exit point long queue of cars at entry/ exit is a familiar scenario. VISSIM can help analyze such situations with expected traffic volumes and become an excellent decision support tool to validate the design intentions.
Vehicle - Pedestrian Conflicts :
At most modal interchange points, vehicle-pedestrian conflict is a common situation. These situations are needed to be analyzed for finding out capacity of space to accommodate expected volumes. VISSIM provides easy way to visualize such situation at stage well before implementation of a project.
BRT Corridor
Terminal Design
Parking Systems
Pedestrian Networks & Movement inside Building
Special Event Traffic Management Plan
Disaster Management
BRT Corridor
All city level projects like BRT corridors need in depth assessment before implementation using latest tools like VISSIM. This will not only give a better visualization of scenario with assigned traffic volumes but will also assess operational and geometric error/discrepancies of the system design. The simulation can highlight the points of conflicts, congestion and inefficiencies. The tool provides faster methods to look at multiple solutions with various possible alterations.
Terminal Design
Facilities like transport terminals act as of point multimodal interchange for both passengers or freight. It makes transport terminal as an active point for large number of complex activities (entry & exit, traffic circulation, parking of vehicles, pedestrian flow including vertical and horizontal movements) going on simultaneously. VISSIM provides a means to assess the design and capacity of transport terminal to accommodate the required no. of vehicles at a time and also the flow of traffic and pedestrians. Output can be utilized to ascertain flow operations within terminal.
Parking Systems
The facilities like parking system work on complex 'user-space-time-flow' dynamics. This dynamic nature of such systems makes it even more important to use better & advanced planning tools for analysis. A parking system includes various components like entry and exit queuing zones, deposit & retrieval servers or curved ramps. Analysis of these components for vehicle flows, arrival & service rates, holding capacities using VISSIM as a simulations tool can provide key efficiency parameters to assess efficacy and impact of such facilities on the context area traffic movement.
Pedestrian Networks & Movement inside Building
At most of the transport stations or interchange points like metro stations, or special events buildings like cinema halls, theatre etc and many other situations pedestrian flow have tidal variation. Such places are to be designed in accordance with maximum volumes expected. VISSIM provides a professional, realistic model of pedestrian behaviors patterns for assessment of scenarios and finding out point of conflicts and potential failures.
Special Event Traffic Management Plan
Special event like international conferences, parades, events of common wealth games etc requires a traffic management plan. This includes traffic routing, entry/ exit at event venue, parking of vehicles, shuttle services, check post, pedestrian flow, segregation of elites and participants from viewers etc. VISSIM provides excellent tool for analysis of this kind of scenario. Operation & management plan for such special situations may be analysed, evaluated and reviewed.
Disaster Management
Disaster prevention, management and recovery is crucial for many unwanted situations. Planning for such situation helps in minimizing the loss in case of any mishap. Disaster related 'traffic surges' can be analyzed for any such situations including developing mock drill movement paths for awareness and instructions to make people act according to a specified plan after the disaster has struck.
All city level projects like BRT corridors need in depth assessment before implementation using latest tools like VISSIM. This will not only give a better visualization of scenario with assigned traffic volumes but will also assess operational and geometric error/discrepancies of the system design. The simulation can highlight the points of conflicts, congestion and inefficiencies. The tool provides faster methods to look at multiple solutions with various possible alterations.
Terminal Design
Facilities like transport terminals act as of point multimodal interchange for both passengers or freight. It makes transport terminal as an active point for large number of complex activities (entry & exit, traffic circulation, parking of vehicles, pedestrian flow including vertical and horizontal movements) going on simultaneously. VISSIM provides a means to assess the design and capacity of transport terminal to accommodate the required no. of vehicles at a time and also the flow of traffic and pedestrians. Output can be utilized to ascertain flow operations within terminal.
Parking Systems
The facilities like parking system work on complex 'user-space-time-flow' dynamics. This dynamic nature of such systems makes it even more important to use better & advanced planning tools for analysis. A parking system includes various components like entry and exit queuing zones, deposit & retrieval servers or curved ramps. Analysis of these components for vehicle flows, arrival & service rates, holding capacities using VISSIM as a simulations tool can provide key efficiency parameters to assess efficacy and impact of such facilities on the context area traffic movement.
Pedestrian Networks & Movement inside Building
At most of the transport stations or interchange points like metro stations, or special events buildings like cinema halls, theatre etc and many other situations pedestrian flow have tidal variation. Such places are to be designed in accordance with maximum volumes expected. VISSIM provides a professional, realistic model of pedestrian behaviors patterns for assessment of scenarios and finding out point of conflicts and potential failures.
Special Event Traffic Management Plan
Special event like international conferences, parades, events of common wealth games etc requires a traffic management plan. This includes traffic routing, entry/ exit at event venue, parking of vehicles, shuttle services, check post, pedestrian flow, segregation of elites and participants from viewers etc. VISSIM provides excellent tool for analysis of this kind of scenario. Operation & management plan for such special situations may be analysed, evaluated and reviewed.
Disaster Management
Disaster prevention, management and recovery is crucial for many unwanted situations. Planning for such situation helps in minimizing the loss in case of any mishap. Disaster related 'traffic surges' can be analyzed for any such situations including developing mock drill movement paths for awareness and instructions to make people act according to a specified plan after the disaster has struck.