J Allison ButlerJ. Allison Butler has worked in a range of local, regional, and state transportation agencies during a thirty year career. The author of more than seventy-five professionally published works, Butler has been a consistent innovator in such fields as satial database design, traffic engineering, planning policy, and economic development. He is a frequent conference speaker and workshop instructor on a number of topics, including highway safety, geodatabase design, agency management, and land-use planning. Read More Read Less