Theodore E. Cohn

About Theodore E. Cohn (Edit profile)

Theodore E. Cohn is a Professor of Vision Science at the School of Optometry and Professor of Bioengineering in the Department of Bioengineering, University of California, Berkeley, CA 94720-2020 (tecohn@spectacle.berkeley.edu).

On The Back Of The Bus

Theodore E. Cohn

You'll no doubt be surprised to read that transit buses get rear-ended more often than passenger cars do. You’re surprised, I suspect, because buses are so large and obvious. Who could fail to see that bulky bus? Who could fail to know it moves slowly and stops often? These collisions are a tremendous waste of resources. Crashes injure both bus patrons and passengers in other vehicles, damage expensive equipment, cause delays and service disruptions, worsen traffic congestion, lessen acceptance of transit as a travel choice, and they’re expensive. A 1997 estimate found that each crash cost $54,000. Plus, we find, these crashes are largely preventable.

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Objects in Mirror are Closer Than They Appear

Theodore E. Cohn

Roads, bridges, gasoline, internal combustion engines, and automatic transmissions were singular advances on the way to modern automobiles. But, without goggles, the horseless carriage might have been slow to arrive. Dust in the eye was objectionable, debilitating, and dangerous at the new high speeds. Whatever access the automobile promised, a driver couldn’t enjoy it if blinded, even momentarily. Developments leading to modern transport systems have been a long series of accommodations to what our eyes can and can’t do. Because future developments must compensate for the limitations of human sight and take advantage of its capabilities, my laboratory has been examining various relations between vision and transportation. Here I’d like to tell about some of those relations.

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