Merging vehicles should always give existing expressway traffic the right of way.

a. true
b. false

B. False      

Explanation:

An expressway is a highway which are designed for high speed traffic. They have a controlled entrance as well as an exit. There are usually more than two lanes.

vehicles merging in the expressway is very crucial. The increasing speed of the vehicle before entering the expressway will not interrupt the existing traffic in the expressway. The right of way is given to both the vehicles which are on the expressway as well as the merging vehicle to adjust their speed to avoid collisions.

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the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.