Question

THE FIRST ELECTRIC TRAFFIC LIGHTS

In the early 1900's, the world was developing at a very rapid pace, and with the growth of industrialization, cities became more crowded. Furthermore, with the invention automobiles, the traffic on the roads increased significantly, so there was a need for a better traffic system.

In 1912, an American policeman, Lester Wire, who was concerned with the increasing traffic, came up with the idea of the first electric traffic light. Based on Wire's design, the lights were first installed in Cleveland, Ohio, on August 5, 1914, at the corner of 105th and Euclid Avenue.

The first electric traffic light had only red and green lights; it did not have a yellow light like modern- day traffic signals. Instead of a yellow light, it had a buzzer sound that was used to indicate that the signal would be changing soon.

In the year 1920, a policeman named William Potts in Detroit, Michigan invented the first four-way and three-colored traffic lights. Apart from red and green, a third color - amber (or yellow) - was introduced. Detroit became the first city to implement the four-way and three-colored traffic lights. In the 1920's, several automated traffic signals were installed in major cities around the world. The modern traffic light still uses this famous T-shaped model with three different colors.

116. When was the first electric traffic light invented?

A. In the early 1900's                              B. In 1912                         C. On August 5, 1914                   

117. Who invented the first electric traffic light?

A. William Potts                                      B. Lester Wire                  C. Euclid Avenue

118. How many colors did the first electric traffic light have?

A. 2                                                           B. 3                                    C. 4

119. Where were the lights first installed?

A. Cleveland, Ohio                                B. Euclid Avenue             C. at the corner of 105th

120. Where were the first three coloured traffic lights used?

A. Detroit                                                  B. Ohio                              C. Euclid Avenue