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A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access highway, or a translation for autobahn, autoroute, etc.
A ramp meter, ramp signal, or metering light is a device, usually a basic traffic light or a two-section signal light together with a signal controller, that regulates the flow of traffic entering freeways according to current traffic conditions. Ramp meters are used at freeway on-ramps to manage the rate of automobiles entering the freeway. Ramp metering systems have proved to be successful in decreasing traffic congestion and improving driver safety.
State Route 237 is a state highway in the U.S. state of California that runs from El Camino Real in Mountain View to Interstate 680 in Milpitas. Known as the Southbay Freeway for most of its length, SR 237 runs south of the San Francisco Bay, connecting the East Bay to the Peninsula.
The Trans-Texas Corridor (TTC) was a proposal for a transportation network in the U.S. State of Texas that was conceived to be composed of a new kind of transportation modality known as supercorridors. The TTC was initially proposed in 2001 and after considerable controversy was discontinued by 2010 in the planning and early construction stages.
A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms include throughway and parkway. Some of these may be limited-access highways, although this term can also refer to a class of highway with somewhat less isolation from other traffic.
In mathematics and transportation engineering, traffic flow is the study of interactions between travellers and infrastructure, with the aim of understanding and developing an optimal transport network with efficient movement of traffic and minimal traffic congestion problems.
Microsimulation is a category of computerized analytical tools that perform highly detailed analysis of activities such as highway traffic flowing through an intersection, financial transactions, or pathogens spreading disease through a population. Microsimulation is often used to evaluate the effects of proposed interventions before they are implemented in the real world. For example, a traffic microsimulation model could be used to evaluate the effectiveness of lengthening a turn lane at an intersection, and thus help decide whether it is worth spending money on actually lengthening the lane.
California's transportation system is complex and dynamic. Although known for its car culture and extensive network of freeways and roads, the state also has a vast array of rail, sea, and air transport. Several subway, light rail, and commuter rail networks are found in many of the state's largest population centers. In addition, with the state's location on the West Coast of the United States, several important ports in California handle freight shipments from the Pacific Rim and beyond. A number of airports are also spread out across the state, ranging from small general aviation airports to large international hubs like Los Angeles International Airport and San Francisco International Airport.
The Texas Department of Transportation (TxDOT) is a governmental agency and its purpose is to "provide safe, effective, and efficient movement of people and goods" throughout the state. Though the public face of the agency is generally associated with maintenance of the state's immense highway system, the agency is also responsible for aviation in the state and overseeing public transportation systems.
PTV Vissim is a microscopic multi-modal traffic flow simulation software package developed by PTV Planung Transport Verkehr AG in Karlsruhe, Germany. The name is derived from "Verkehr In Städten - SIMulationsmodell". PTV Vissim was first developed in 1992 and is today a global market leader.
Caliper Corporation was founded in 1983 as a developer of mapping software and is headquartered in Newton, Massachusetts.
Aimsun Live is a simulation-based traffic forecasting solution, developed and marketed by Aimsun.
Virginia HOT lanes refers to six separate projects in the U.S. state of Virginia. The first project, completed in November 2012, added high-occupancy/toll (HO/T) lanes to the Capital Beltway (I-495) in Fairfax County. The second project, opened to the public in December 2014, involved converting and extending the existing reversible high-occupancy vehicle (HOV) lanes on I-95 and a portion of I-395 to HO/T lanes from Stafford to near Alexandria. The third project converted all lanes on I-66 inside the Beltway to peak-direction HO/T lanes, opening on December 4, 2017. The fourth project will reconstruct approximately 21 miles (34 km) of I-66 outside the Beltway, making it a 10-lane corridor. The fifth project, which was completed in November 2019, essentially extended the aforementioned I-95/I-395 project several miles to the north, converting the existing reversible HOV lanes on I-395 to HO/T lanes from near Alexandria to Washington, DC. The sixth project will convert the existing reversible HOV lanes to HO/T Lanes on Interstate 64 from Interstate 564 in Norfolk to Interstate 264 in Virginia Beach, and also propose to expand the I-64 express lanes before and after the HO/T Lanes.
Traffic simulation or the simulation of transportation systems is the mathematical modeling of transportation systems through the application of computer software to better help plan, design, and operate transportation systems. Simulation of transportation systems started over forty years ago, and is an important area of discipline in traffic engineering and transportation planning today. Various national and local transportation agencies, academic institutions and consulting firms use simulation to aid in their management of transportation networks.
Paramics is traffic microsimulation software, originally developed by Quadstone Ltd. There is a related pedestrian microsimulation product called the Urban Analytics Framework.
TSIS-CORSIM is a microscopic traffic simulation software package for signal systems, highway systems, freeway systems, or combined signal, highway and freeway systems. CORSIM consists of an integrated set of two microscopic simulation models that represent the entire traffic environment. NETSIM represents traffic on urban streets. FRESIM represents traffic on highways and freeways. Microscopic simulation models the movements of individual vehicles, which include the influences of geometric conditions, control conditions, and driver behavior. TSIS is an integrated development environment that enables users to conduct traffic operations analysis. Built using a component architecture, TSIS allows the user to customize the set of included tools, define and manage traffic analysis projects, define traffic networks and create inputs for traffic simulation analysis, execute traffic simulation models, and interpret the results of those models.
PTV AG is a German company specialising in software and consulting services for traffic and transportation, mobility, and logistics. "Vision Traffic Suite", their transport planning software, and "PTV Map&Guide", their program for route planning, comprise the PTV AG's product portfolio. According to the manufacturer, over 2,000 customers in more than 90 countries use the Vision Traffic Suite in the fields of transport modelling and traffic flow calculation. PTV ranks among the top 1,000 global market leaders in Germany according to Germany's Manager Magazin. The German company PTV Planung Transport Verkehr AG is a member of PTV Group.
The UC Irvine Institute of Transportation Studies (ITS), is a University of California organized research unit with sister branches at UC Davis, and UC Berkeley. ITS was established to foster research, education, and training in the field of transportation. UC Irvine ITS is located on the fourth floor of the Anteater Instruction and Research Building at University of California, Irvine's main Campus, and also houses the UC Irvine Transportation Science graduate studies program.
Terminology related to road transport—the transport of passengers or goods on paved routes between places—is diverse, with variation between dialects of English. There may also be regional differences within a single country, and some terms differ based on the side of the road traffic drives on. This glossary is an alphabetical listing of road transport terms.
A managed lane is a type of highway lane that is operated with a management scheme, such as lane use restrictions or variable tolling, to optimize traffic flow, vehicle throughput, or both. Definitions and goals vary among transport agencies, but managed lanes are generally implemented to achieve an improved operational condition on a highway, such as improving traffic speed and throughput, reducing air pollution, and improving safety. Types of managed lanes include High-occupancy vehicle (HOV) lanes, High-occupancy toll lanes, express toll lanes, reversible lanes, and bus lanes. Most managed lane facilities are located in the United States, although HOV and bus lanes can be found in many other countries; outside of the US, many countries use active traffic management that manage all lanes of a highway.
References
- ↑ Contents of The Urban Transportation Monitor
- ↑ Mahmud, Khizir; Town, Graham E. (June 2016). "A review of computer tools for modeling electric vehicle energy requirements and their impact on power distribution networks". Applied Energy. 172: 337–359. doi:10.1016/j.apenergy.2016.03.100.