professional, he or she must make critical decisions about the system that will affect the
thousands of people who use it. The work depends on the results of experience and research
and is challenging and ever-changing as new needs emerge and new technologies
replace those of the past. The challenge of the transportation engineering profession is to
assist society in selecting the appropriate transportation system consistent with its economic
development, resources, and goals and to construct and manage the system in a safe
and efficient manner.