Results 31 to 40 of about 51,955 (162)

Impact of visibility on traffic Incidents at signalized intersections –a case study in Polish cities

open access: yesArchives of Transport
In urban agglomerations, signalized intersections are common. However, in traffic management, safety-focused strategies are often sacrificed for traffic efficiency by allowing simultaneous multiple conflicting movements.
Damian Iwanowicz, Radosław Klusek
doaj   +1 more source

Close-range leader–follower flight control technology for near-circular low-orbit satellites

open access: yesOpen Astronomy, 2022
Based on the characteristics of near-circular orbits and close-range leader–follower flights, the relative dynamics equations of the eccentricity/inclination (e/i) vector method are introduced herein.
Yang Yuan   +4 more
doaj   +1 more source

Determination of Sight Distance Requirements for Finnish Level Crossings [PDF]

open access: yesThe Open Transportation Journal, 2011
Safety at level crossings is a major concern for Finnish railways. Less than a quarter of all 4,061 level crossings are equipped with active warning devices, mainly barriers but also warning lights and bells. Especially at passive level crossings it is entirely up to the road user to know whether it is safe to cross the railway.
Ahtiainen, Anne, Kallberg, Veli-Pekka
openaire   +3 more sources

The Sight Distance Issues with Retrofitted Single-Lane HOV Facilities

open access: yesInternational Journal of Transportation Science and Technology, 2013
It is well-known that obstruction inside a highway horizontal curve will lead to impaired sight distance. Highway alignment design standards in terms of the minimum horizontal curve radius are specified to allow for adequate stopping sight distance at ...
Zhongren Wang
doaj   +1 more source

Recognition sight distance and minimum radius of vertical curves at expressway tunnel entrances

open access: yesZhongwai Gonglu
Lane changing is generally prohibited and strict speed limits are imposed in expressway tunnels in China. To ensure that drivers can safely and comfortably complete lane changes and speed adjustments before entering a tunnel, horizontal curves should ...
Fu Zhipeng   +5 more
doaj   +1 more source

Wideband UHF and SHF long-range channel characterization

open access: yesEURASIP Journal on Wireless Communications and Networking, 2019
This paper presents an outdoor long-range (from 315 m up to 5.3 km) fixed channel campaign for both ultra high frequency and super high frequency bands with co-polarized horizontal and vertical antenna configurations.
Edward Kassem   +6 more
doaj   +1 more source

Reliability-Based Analysis of Sight Distance Modelling for Traffic Safety

open access: yesJournal of Advanced Transportation, 2017
Sight distance is of the utmost importance for traffic safety. The consideration of three-dimensional (3D) available sight distance (ASD) in geometric design has been supported by several researchers.
César de Santos-Berbel   +3 more
doaj   +1 more source

Theoretical differences between Overtaking Sight Distance and Sight Distance for Safe Overtaking

open access: yesPut i saobraćaj
The current legislation mentions the terms Overtaking Sight Distance and Sight Distance for Safe Overtaking, which are contained in the Rulebook on the conditions that road facilities and other elements of public roads must meet from the aspect of road safety and the Rulebook on Traffic Signage.
Borivoje Aleksić   +2 more
openaire   +1 more source

Eat me if you can: cognitive mechanisms underlying the distance effect.

open access: yesPLoS ONE, 2013
Proximal objects provide affordances that activate the motor information involved in interacting with the objects. This effect has previously been shown for artifacts but not for natural objects, such as food.
Astrid F Junghans   +2 more
doaj   +1 more source

Estimation of Suitable Grade Value for Stopping Sight Distance Computation on Vertical Curves

open access: yesIraqi Journal of Civil Engineering, 2008
The purpose of highway geometric design is to provide safe and economical highways. One of the important geometric design elements for safety is visibility on designed roads.
Ahmed H. Farhan
doaj   +1 more source

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