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TrafficThis article is about Vehicular traffic. For other meanings of "Traffic" see Traffic (disambiguation).
Organized traffic
Western vehicular traffic is generally organized, flowing in lanes of travel for a particular direction, with interchanges, traffic signals, and/or signageage at intersectons to facilitate the orderly and timely flow of traffic. Vehicles also generally travel at the same speed on a given roadway.
Organized traffic typically reduces travel time. Though vehicles wait at some intersections, wait time at others is much shorter. Organized traffic degenerates to disorganized with an unexpected occurrence, be it road construction, an accident, or an animal obstructing the road. On particularly busy freeways, a disruption can persist until traffic thins. William Beaty observed persistent disruptions and named the phenomenon traffic waves.
Simulations of organized traffic frequently involve queuing theory and stochastic processes.
Unorganized traffic
Unorganized traffic occurs in the absence of lanes and/or signals. Roads do not have lanes, though operators tend to keep to the appropriate side if the road is wide enough. Operators frequently overtake other operators, and obstructions are not uncommon.
Intersections have no signals or signage, and a particular road at a busy intersection may be dominant (that is, its traffic flows) until a break in traffic, at which time the dominance shifts to the other road where vehicles are queued. At the intersection of two perpendicular roads, a traffic jam results if four vehicles face each other side-on.
Which side?
Brian Lucas answers the question, "Which side of the road do they drive on?" About 34% of the world by country population drives on the left, and 66% keeps right. By roadway miles, about 72% drive on the right.
See also
External links
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Micrologic Systems Inc.
Manufactures products for the transportation and utility industries, such as computerized toll and fare collection systems, and vehicle tracking systems.
http://www.micrologic-systems.com/
Work Area Protection Corporation
Manufacturer of traffic control and work zone safety products.
http://www.workareaprotection.com/
Plastic Safety Systems, Inc.
Manufacturers of temporary traffic safety and control devices such as channelizers, delineators, and reflective fencing.
http://www.plasticsafety.com
Athens Technical Specialists Inc.
A manufacturer of electrical test equipment for the traffic signal, highway, roads, and custom design markets with information on products, training, distributors, the company and contacts.
http://www.atsi-tester.com
Advantec Consulting Engineers
Transportation engineers and intelligent traffic management systems experts.
http://www.advantec-usa.com/
Cloverleaf Corporation
Manufacturers representative for traffic control and traffic safety systems. Products include impact attenuators, pavement marking materials, and decorative surfacing treatments.
http://www.cloverleafcorp.com/
Quixote Corporation
Manufactures impact-absorbing highway and truck-mounted crash cushions, vehicle arresting systems, and related highway safety products, including highway advisory radio systems to inform motorists of accidents and traffic delays. (Nasdaq: QUIX).
http://www.quixotecorp.com/
Polara Engineering
Manufacturer of accessible pedestrian signals that aid the elderly and disabled to cross busy city intersections. Information on models and ordering.
http://www.polara.com/
Blakedale Verge and Marker Posts
Manufacturer and supplier of a complete range of distance marker posts and verge markers.
http://www.roadsafety.co.uk/
Maxiforce 1
Collapsible bollards to help control pedestrian and automobile through traffic.
http://www.maxiforcebollard.com/
Inline Barricades
Manufacturer and designer of barricades and barriers for crowd and vehicle control including police-style, steel, plastic, and portable barricades.
http://www.inlinebarricades.com/
JAMAR Technologies
Manufacturer of traffic counters, traffic analysis software, distance measuring instruments, and related products.
http://www.jamartech.com/
JBC Safety
Supplies traffic control equipment including traffic cones, barricade boards, pavement markers, and related products.
http://www.jbcsafety.com/
RoadVision Technologies
Manufactures Highway Beacon, the snowplowable raised reflective pavement marker.
http://www.highwaybeacon.com/
Prismo
Manufacturer and supplier of specialist road and associated products.
http://www.prismo.co.uk/
Roadtech Manufacturing
Manufacture traffic safety equipment including traffic cones, barricades, and security convex mirrors.
http://www.roadtech.com/
Telephonics Corporation
Specializing in communications systems for aircraft and mass transit and other traffic management systems.
http://www.telephonics.com/
Traffic and Parking Control Co., Inc. (TAPCO)
A manufacturer of traffic and parking control signs, pavement markings and related products.
http://www.tapconet.com/
Traffic Control Products Co., Inc.
Road and construction signs and other traffic safety and control products.
http://www.tcpofms.com/
Vistaplan International
Manufacturer of security, drawing, and storage system products.
http://www.vistaplan.com/
American Signal Company (AMSIG)
Manufacturer of stationary and portable electronic changeable message signs and sign systems.
http://www.amsig.com/
The Revenue Markets [TRMI]
Toll system and equipment products including treadles, ETC systems, coin machines, gates, and collector terminals.
http://www.revenuemarkets.com/
Component Products
Manufacturer of traffic signal poles, shrouds, polycarbonate framework, and related products.
http://www.componentproducts.com/
Tolltex, Inc.
Provides toll collection systems and services including lane traffic signals, canopy traffic signals, receipt printers, plaza and host computer systems, and related products.
http://www.tolltex.com/
United Toll Systems
Offering toll systems, facilities management, and road and bridge construction solutions.
http://www.unitedtoll.com/
Lakeside Plastics, Inc.
Manufacturer of traffic cones, barrels and other related safety items.
http://www.lakesideplastics.net
GNR Technologies
Design and manufacture infrastructure and traffic safety products from recycled rubber. Products include speed bumps and parking curbs.
http://www.gnrtech.com/
Haldo
Manufacturer of traffic management products, specializing in traffic bollards and cones. Includes a listing of world distributors and an online store for automotive and safety clothing products.
http://www.haldo.com/
TCISytems LLC
Manufacture a programmable retractable speed bump device. Includes specifications and applications.
http://tcisystems.twoffice.com/
Traffic Control Devices, Inc.
Installers and maintainers of traffic signal equipment, signs, and intelligent transportation systems. Includes contact locations and employment opportunities.
http://www.trafficcontroldevices.com/
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