1. + The First Electric Traffic Signal By: Damelvy Rodriguez

2. + Lester Wire Born on September 3, 1887 in Salt Lake City Salt Lake City Police Officer Wrote the first traffic regulations for Salt Lake City Created the first traffic signal in Salt Lake City Participated in WWI Missed the opportunity of patenting his invention

3. + First Electric Traffic Light

4. + Installed ion 1912 at the intersection of Main Street and Second South in Salt Lake City, UT First version was a hand-made, wooden box, with a slanted roof to protect against bad weather. It resembled a birdhouse.

5. + Public’s Perception Out-of-towners were impressed by the technology. Locals felt that the traffic signal “infringed on their freedom.” Traffic signal was physically destroyed. Assigned traffic officers would be accused of playing favorites.

6. + Evolution was Communication Every time the public complain about the traffic signal Mr. Wire updated the model 1. Public destroyed traffic signal Hung traffic signal from overhead wires. 2. Public accused officers controlling the signal switch of playing favorites Traffic signal was updated to automatically change colors.

7. + Future Versions of the Traffic Signal William Potts, 1920, Detroit Recognize that a change in color signal needed to be announce. Introduced the third color signal to the traffic signal, yellow.

8. + Future Versions of the Traffic Signal Garrett Morgan, 1923, Cleveland After witnessing the death of a young girl from a car accident, he felt the traffic needed to be regulated. First person to patent the traffic signal Sold the patent to GE for $40,000

9. + References http://www.ksl.com/?nid=1012&sid=35930882 http://www.examiner.com/article/salt-lake-original-the-electric-traffic- signal http://www.examiner.com/article/salt-lake-original-the-electric-traffic- signal http://content.lib.utah.edu/cdm/compoundobject/collection/USHSArchPub/ id/3652 http://content.lib.utah.edu/cdm/compoundobject/collection/USHSArchPub/ id/3652 https://www.udot.utah.gov/main/uconowner.gf?n=12019325197918360 https://www.udot.utah.gov/public/ucon/uconowner.gf?n=200607251458111 http://vif2013.com/about/historical-inventions http://ideastations.org/science-matters/hot-shots/hot-jobs/garrett-morgan- man-who-stopped-traffic http://ideastations.org/science-matters/hot-shots/hot-jobs/garrett-morgan- man-who-stopped-traffic http://www.kbrhorse.net/signals/darley_c810.html http://designobserver.com/feature/red-light-green-light--the-invention-of-- the-traffic-signal/8627/