Lambert M. SurhoneISBN: 978-6-1320-0106-1;
In road transport, a YIELD (Canada, Ireland, and the United States) or GIVE WAY (Hong Kong and most Commonwealth countries) traffic sign indicates that a vehicle driver must prepare to stop if necessary to let a driver on another approach proceed (but has no need to stop if his way is clear). A driver who stops has yielded his right of way to another. In contrast, a stop sign always requires a complete stop. The first yield sign was installed in Tulsa, Oklahoma, having been devised and designed by Tulsan police officer Clinton Riggs. Riggs invented only the sign, not the rule, which was already in place. Despite Oklahoma being landlocked, it is sometimes suggested the rule was made by analogy to the International Regulations for Preventing Collisions at Sea. The sign as originally conceived by Officer Riggs was shaped like a keystone; later versions bore the shape of an inverted equilateral triangle which has been almost universally adopted....
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