Voluntary compliance with the 55 MPH national speed limit - a report to the Secretary of Transportation by the National Highway Safety Advisory Committee.

Mode of access: Internet.

An evaluation of warning and regulatory signs for curves on rural roads. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

National maximum speed limit (NMSL) enforcement practices and procedures, phase II. Interim report.

National Highway Traffic Safety Administration, Washington, D.C.

National maximum speed limit and highway safety program regional workshops. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

The effects of the 65 mph speed limit through 1989. A report to Congress December 1990.

Mode of access: Internet.

Safety consequences of raising the national speed limit from 55 mph to 60 mph. Technical report.

Mode of access: Internet.

Safety aspects of the national 55 mph speed limit. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Traffic speed limit in the United States.

National Highway Traffic Safety Administration, Washington, D.C.

The national maximum speed limit. A summary of three regional workshops.

National Highway Traffic Safety Administration, Traffic Safety Programs, Washington, D.C.

To provide compliance with the National maximum speed limit [microform] : hearing before the Subcommittee on Transportation of the Committee on Environment and Public Works, United States Senate, Ninety-sixth Congress, second session, on S. 1337 ... June 3, 1980.

Reuse of record except for individual research requires license from Congressional Information Service, Inc.

Effect of the 55 mph speed limit law on fatal crashes in Texas.

Mode of access: Internet.

A Preliminary assessment of the increased speed limit on rural interstate highways in Illinois /

At head of title on cover: Welcome to life in Illinois.

Assessment of the effect of the 55 mile per hour speed limit on Illinois traffic safety : report to the Eightieth General Assembly.

Cover title: Illinois traffic safety programs.

Electromagnetic interference from variable speed motor drives

A methodology is presented which can be used to produce the level of electromagnetic interference, in the form of conducted and radiated emissions, from variable speed drives, the drive that was modelled being a Eurotherm 583 drive. The conducted emissions are predicted using an accurate circuit model of the drive and its associated equipment. The circuit model was constructed from a number of different areas, these being: the power electronics of the drive, the line impedance stabilising network used during the experimental work to measure the conducted emissions, a model of an induction motor assuming near zero load, an accurate model of the shielded cable which connected the drive to the motor, and finally the parasitic capacitances that were present in the drive modelled. The conducted emissions were predicted with an error of +/-6dB over the frequency range 150kHz to 16MHz, which compares well with the limits set in the standards which specify a frequency range of 150kHz to 30MHz. The conducted emissions model was also used to predict the current and voltage sources which were used to predict the radiated emissions from the drive. Two methods for the prediction of the radiated emissions from the drive were investigated, the first being two-dimensional finite element analysis and the second three-dimensional transmission line matrix modelling. The finite element model took account of the features of the drive that were considered to produce the majority of the radiation, these features being the switching of the IGBT's in the inverter, the shielded cable which connected the drive to the motor as well as some of the cables that were present in the drive.The model also took account of the structure of the test rig used to measure the radiated emissions. It was found that the majority of the radiation produced came from the shielded cable and the common mode currents that were flowing in the shield, and that it was feasible to model the radiation from the drive by only modelling the shielded cable. The radiated emissions were correctly predicted in the frequency range 30MHz to 200MHz with an error of +10dB/-6dB. The transmission line matrix method modelled the shielded cable which connected the drive to the motor and also took account of the architecture of the test rig. Only limited simulations were performed using the transmission line matrix model as it was found to be a very slow method and not an ideal solution to the problem. However the limited results obtained were comparable, to within 5%, to the results obtained using the finite element model.

Issues and concerns of microscopic calibration process at different network levels : case study of Pacific Motorway

Calibration process in micro-simulation is an extremely complicated phenomenon. The difficulties are more prevalent if the process encompasses fitting aggregate and disaggregate parameters e.g. travel time and headway. The current practice in calibration is more at aggregate level, for example travel time comparison. Such practices are popular to assess network performance. Though these applications are significant there is another stream of micro-simulated calibration, at disaggregate level. This study will focus on such microcalibration exercise-key to better comprehend motorway traffic risk level, management of variable speed limit (VSL) and ramp metering (RM) techniques. Selected section of Pacific Motorway in Brisbane will be used as a case study. The discussion will primarily incorporate the critical issues encountered during parameter adjustment exercise (e.g. vehicular, driving behaviour) with reference to key traffic performance indicators like speed, lane distribution and headway; at specific motorway points. The endeavour is to highlight the utility and implications of such disaggregate level simulation for improved traffic prediction studies. The aspects of calibrating for points in comparison to that for whole of the network will also be briefly addressed to examine the critical issues such as the suitability of local calibration at global scale. The paper will be of interest to transport professionals in Australia/New Zealand where micro-simulation in particular at point level, is still comparatively a less explored territory in motorway management.