scholarly journals Evaluation of Driver Compliance to Displayed Variable Advisory Speed Limit Systems: Comparison between Germany and the U.S.

2016 ◽  
Vol 15 ◽  
pp. 640-651 ◽  
Author(s):  
Gary Riggins ◽  
Robert Bertini ◽  
Williams Ackaah ◽  
Martin Margreiter
Keyword(s):  
Speed Limit ◽  
Advisory Speed ◽  
The U.S

scholarly journals Speed Limit and Fatalities in the U.S.: Implication for Transportation Policy

2017 ◽  
Vol 07 (05) ◽  
pp. 1398-1412
Author(s):  
Kashif Zaheer Malik ◽  
Ammar Aftab
Keyword(s):  
Transportation Policy ◽  
Speed Limit ◽  
The U.S

What is the speed limit along the U.S. Phillips curve?

1991 ◽  
Vol 13 (3) ◽  
pp. 417-434 ◽  
Author(s):  
Martin F.J. Prachowny
Keyword(s):  
Phillips Curve ◽  
Speed Limit ◽  
The U.S

Adaptive advisory speed limit dissemination using vehicular communication

2014 ◽  
Author(s):  
Ali Jalooli ◽  
Mohammad Reza Jabbarpour ◽  
Hossein MalakootiKhah ◽  
Erfan Shaghaghi ◽  
Alireza Marefat ◽  
...  
Keyword(s):  
Speed Limit ◽  
Vehicular Communication ◽  
Advisory Speed

Development and Field Evaluation of Variable Advisory Speed Limit System for Work Zones

2007 ◽  
Vol 2015 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Eil Kwon ◽  
Daniel Brannan ◽  
Kahled Shouman ◽  
Cassandra Isackson ◽  
Bernie Arseneau
Keyword(s):  
Field Evaluation ◽  
Speed Limit ◽  
Work Zones ◽  
Limit System ◽  
Advisory Speed

scholarly journals Intelligent Advisory Speed Limit Dedication in Highway Using VANET

2014 ◽  
Vol 2014 ◽  
pp. 1-20 ◽  
Author(s):  
Ali Jalooli ◽  
Erfan Shaghaghi ◽  
Mohammad Reza Jabbarpour ◽  
Rafidah Md Noor ◽  
Hwasoo Yeo ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Traffic Safety ◽  
Control Strategy ◽  
Ad Hoc ◽  
Road Traffic ◽  
Weather Conditions ◽  
Speed Limit ◽  
Road Traffic Safety ◽  
Simulation Results ◽  
Advisory Speed

Variable speed limits (VSLs) as a mean for enhancing road traffic safety are studied for decades to modify the speed limit based on the prevailing road circumstances. In this study the pros and cons of VSL systems and their effects on traffic controlling efficiency are summarized. Despite the potential effectiveness of utilizing VSLs, we have witnessed that the effectiveness of this system is impacted by factors such as VSL control strategy used and the level of driver compliance. Hence, the proposed approach called Intelligent Advisory Speed Limit Dedication (IASLD) as the novel VSL control strategy which considers the driver compliance aims to improve the traffic flow and occupancy of vehicles in addition to amelioration of vehicle’s travel times. The IASLD provides the advisory speed limit for each vehicle exclusively based on the vehicle’s characteristics including the vehicle type, size, and safety capabilities as well as traffic and weather conditions. The proposed approach takes advantage of vehicular ad hoc network (VANET) to accelerate its performance, in the way that simulation results demonstrate the reduction of incident detection time up to 31.2% in comparison with traditional VSL strategy. The simulation results similarly indicate the improvement of traffic flow efficiency, occupancy, and travel time in different conditions.

scholarly journals An application of direct method and ball-bank indicator method to determine advisory speeds for horizontal curves in Vietnam

2020 ◽  
Vol 14 (1) ◽  
pp. 136-145
Author(s):  
Do Duy Dinh ◽  
Le Tien Dung
Keyword(s):  
Traffic Safety ◽  
Direct Method ◽  
Speed Limit ◽  
Operating Speed ◽  
Horizontal Curve ◽  
Indicator Method ◽  
Horizontal Curves ◽  
Road Signs ◽  
The World ◽  
Advisory Speed

Advisory speed signs on horizontal curves have been widely used in many countries over the world to improve traffic safety; however these road signs have not been applied in Vietnam. This paper aims to use the direct method and ball-bank indicator one to determine advisory speeds for 10 horizontal curves all with speed limit of 60 km/h on National Highway No. 4A in Lang Son province. The results showed that, advisory speeds were determined by the ball-bank indicator method ranging from 40 to 45 km/h for curves with radius of 70 m or less and from 50 to 55 km/h for curves with radius varying from 75 m to 120 m. As compared to the ball bank indicator method, advisory speeds determined by the direct method were 0 – 5 km/h higher if using 85th percentile speeds of cars, but 5 – 10 km/h lower if using average speeds of trucks. Keywords: advisory speed limit; operating speed; horizontal curve; ball-bank indicator; traffic safety.

Historical Introduction

1977 ◽  
Vol 35 ◽  
pp. 2-5
Author(s):  
R. D. Heidenreich
Keyword(s):  
Electron Emission ◽  
Secondary Electron ◽  
Secondary Electron Emission ◽  
50Th Anniversary ◽  
Secondary Emission ◽  
Wave Nature ◽  
Nobel Prize In Physics ◽  
Primary Electrons ◽  
The U.S ◽  
Mutual Agreement

This program has been organized by the EMSA to commensurate the 50th anniversary of the experimental verification of the wave nature of the electron. Davisson and Germer in the U.S. and Thomson and Reid in Britian accomplished this at about the same time. Their findings were published in Nature in 1927 by mutual agreement since their independent efforts had led to the same conclusion at about the same time. In 1937 Davisson and Thomson shared the Nobel Prize in physics for demonstrating the wave nature of the electron deduced in 1924 by Louis de Broglie.The Davisson experiments (1921-1927) were concerned with the angular distribution of secondary electron emission from nickel surfaces produced by 150 volt primary electrons. The motivation was the effect of secondary emission on the characteristics of vacuum tubes but significant deviations from the results expected for a corpuscular electron led to a diffraction interpretation suggested by Elasser in 1925.

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