1 May 1972 Hidden Cameras To Detect Wrong Way Driving On Freeway Ramps
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Proceedings Volume 0030, Photo-Optical Instrumentation: A Tool for Solving Traffic and Highway Engineering Problems; (1972); doi: 10.1117/12.953563
Event: Photo-Optical Instrumentation: A Tool for Solving Traffic and Highway Engineering Problems, 1971, Los Angeles, United States
Abstract
This paper discusses the need and de-velopment of equipment to detect wrong way entries into freeway off ramps. The major steps covered are: * History of development * Design and application of camera * Results of information gathered A description of the logic used in construction of the camera is also discussed.
© (1972) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard P. Weaver, "Hidden Cameras To Detect Wrong Way Driving On Freeway Ramps", Proc. SPIE 0030, Photo-Optical Instrumentation: A Tool for Solving Traffic and Highway Engineering Problems, (1 May 1972); doi: 10.1117/12.953563; https://doi.org/10.1117/12.953563
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Cameras

Switches

Roads

Logic

Thallium

Capacitors

Fermium

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