A vehicle is a machine that moves people and things from one place to another. Some vehicles also do work. Road building vehicles are needed to make the streets and highways so that other vehicles can travel on. Many different vehicles are needed to build a road and each does a different job. Some break up the ground to make pathways for new roads or repair old ones. Other vehicles load materials to make roads still others pave the roads. Learn...

Engineers design roads to be as safe and efficient as possible for the people who travel on them. From roundabouts and speed bumps to the routes that roads take, readers will learn how engineers follow the engineering design process to design roads that suit different environments and people who will use them. Vibrant photographs, child-centered examples, and a model-building activity allow readers to step into the shoes of engineers. -- from Amazon....