scholarly journals Effectiveness of red light cameras on the right-angle crash involvement of motorcycles

2010 ◽  
Vol 46 (1) ◽  
pp. 54-66 ◽  
Author(s):  
Hoong Chor Chin ◽  
Md. Mazharul Haque
Keyword(s):  
Red Light ◽  
Red Light Cameras ◽  
The Right

scholarly journals Evaluation of Automated Enforcement Program in Amman

2018 ◽  
Author(s):  
Hana Naghawi ◽  
Bushra Al Qatawneh ◽  
Rabab Al Louzi
Keyword(s):  
Traffic Safety ◽  
Questionnaire Survey ◽  
Positive Impact ◽  
Red Light ◽  
Crash Frequency ◽  
Red Light Running ◽  
Red Light Cameras ◽  
Percent Confidence Level ◽  
Before And After ◽  
Traffic Violations

This study aims, in a first attempt, to evaluate the effectiveness of using the Automated Enforcement Program (AEP) to improve traffic safety in Amman, Jordan. The evaluation of the program on crashes and violations was examined based on a “before-and-after” study using the paired t-test at 95 percent confidence level. Twenty one locations including signalized intersections monitored by red light cameras and arterial roads monitored by excessive speed cameras were selected. Nine locations were used to study the effectiveness of the program on violations, and twelve locations were used to determine the effectiveness of the program on frequency and severity of crashes. Data on number and severity of crashes were taken from Jordan Traffic Institution. Among the general findings, it was found that the AEP was generally associated with positive impact on crashes. Crash frequency was significantly reduced by up to 63%. Crash severities were reduced by up to 62.5%. Also, traffic violations were significantly reduced by up to 66%.  Finally, drivers’ opinion and attitude on the program was also analyzed using a questionnaire survey. The questionnaire survey revealed that 35.5% of drivers are unaware of AEP in Amman, 63.9% of drivers don’t know the camera locations, most drivers knew about excessive speed and red light running penalties, most drivers reduce their speed at camera locations, 44.4% of drivers think that the program satisfies its objective in improving traffic safety and 52% of drivers encourage increasing the number of camera devices in Amman.

Red Light Cameras Reduce Right-angle and Rear-end Crashes

2013 ◽  
Vol 79 (12) ◽  
pp. 347-348
Author(s):  
George M. Testerman ◽  
Laith A Al-Balbissi ◽  
Officer David Quillen
Keyword(s):  
Red Light ◽  
Red Light Cameras

scholarly journals Photosynthetic Units

1968 ◽  
Vol 52 (2) ◽  
pp. 212-239 ◽  
Author(s):  
Georg H. Schmid ◽  
Hans Gaffron
Keyword(s):  
Lamellar Structure ◽  
Photosynthetic Capacity ◽  
Red Light ◽  
Photosynthetic Unit ◽  
Saturation Intensity ◽  
Steady Rate ◽  
New Findings ◽  
Leaf Tissues ◽  
Dark Green ◽  
The Right

Leaf tissues of aurea mutants of tobacco and Lespedeza have been shown to have higher photosynthetic capacity per molecule of chlorophyll, a higher saturation intensity, a simpler lamellar structure, and the same quantum yield as their dark green parents. Here we report on the values of photosynthetic units for both types of plants and some algae. The unit has been assumed to be about as uniform and steady in the plant world as the quantum efficiency. The number on which all theoretical discussions have been based so far is 2400 per O2 evolved or CO2 reduced. With dark green plants and algae our determinations of units by means of 40 µsec flashes superimposed on a steady rate of background photosynthesis at 900 ergs cm-2 sec-1 of red light yielded mostly numbers between 2000 and 2700. However, the photosynthetic unit turned out to be very variable, even in these objects. In aurea mutants the unit was distinctly smaller, averaging 600 chl/CO2. By choosing the right combination of colors for flash and background light, units as low as 300 chl/CO2 or 40 chl/e- could be measured consistently. We found five well-defined groups of units composed of multiples of its smallest member. These new findings are discussed in terms of structural entities that double or divide under the influence of far-red light.

The Impact of Red Light Cameras on Crashes Within Miami–Dade County, Florida

2015 ◽  
Vol 16 (8) ◽  
pp. 773-780 ◽  
Author(s):  
Anthoni F. Llau ◽  
Nasar U. Ahmed ◽  
Hafiz M.R.U. Khan ◽  
Fabian G. Cevallos ◽  
Vukosava Pekovic
Keyword(s):  
Red Light ◽  
Dade County ◽  
Red Light Cameras ◽  
The Impact

Red light for red-light cameras?

2009 ◽  
Vol 41 (5) ◽  
pp. 897-905 ◽  
Author(s):  
Alena Erke
Keyword(s):  
Red Light ◽  
Red Light Cameras
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