Roadgeek
A roadgeek is a person involved in "roadgeeking" or "road enthusiasm", an enthusiasm for roads, fond of road trips as a hobby. One may also be called a road enthusiast, road buff, roadfan or Roads Scholar, the latter a play on "Rhodes Scholar".
Interest
Roadgeeks view their interest as an appreciation of engineering and planning feats:Roadgeeks are not necessarily interested in motor vehicles; there may also be an interest in cartography and map design. Enthusiasts may focus on a single activity related to roads, such as driving the full length of a highway or researching the history, planning and quirks of a particular road or national highway system. Sometimes, road geeks are called "highway historians" for the knowledge and interests.
Even the numbering system can be a subject of deep interest, as Joe Moran describes in his book "On Roads: A Hidden History":
Online
In 2002, the St. Louis Post-Dispatch reported that road enthusiasm was an Internet phenomenon. There is a Usenet newsgroup, misc.transport.road, where participants discuss all facets of roads and road trips from "construction projects to quirks and inconsistencies in signage". Those who await each annual Rand McNally road atlas release found a community of others online who were also interested in roads as a hobby. These communities of people could share photos, swap their thoughts on the highways in their areas and "debate the finer points of interchange design".Web based forums are popular; one of the largest is AARoads Forum.