网站简介：Provides United States Geological Survey photographs overlaid by street names, searchable by street address.
网站简介：Covers the New York City metropolitan area.
网站简介：Lists current and proposed road projects.
网站简介：History and other information.
网站简介：Pathetic Motorways studies the UK motorway network, concentrating on the history and development of the motorway network and those aspects of the network that are unusual or sub-standard. It presents the information in a light-hearted and accessible manner.
网站简介：Authority for the Angus L. Macdonald and A. Murray MacKay Bridges that connect Halifax to Dartmouth in Nova Scotia, Canada.
网站简介：Provides overviews, maps, sample itineraries and images of eight routes offering recreational, geological, cultural and agricultural viewing opportunities. Includes news and calendar of events.
网站简介：An unofficial collection of European road sign conventions and rules.
网站简介：Includes text descriptions of former and current routes, with pictures.
网站简介：Dedicated to researching, promoting and protecting United Kingdom unique heritage of unsurfaced roads and to encouraging their sensible use.
网站简介：Information and history about all past and present numbered routes. Includes maps, future plans, and a list of "secret" routes the state maintains but does not signpost.
网站简介：Official organization with chapters in many states.
网站简介：Quarterly. Contains articles on lesser-travelled roads, some of them formerly main roads.
网站简介：A collection of information relating to the state's roads and highways. Includes news articles and pictures.
网站简介：Includes U.S. and Canada coverage.
网站简介：The standard for signs, signals, and pavement markings in the United Kingdom. Includes graphics..
网站简介：Contains history, pictures and vintage postcards.
网站简介：Includes photographs, route guides, and focus pages covering Oklahoma City and Tulsa.
网站简介：Service available for crossing of various bridges in the Maritime Provinces of Canada. FAQs, price information, and application forms.
网站简介：Construction information. With video.
网站简介：Database of the junctions on every numbered motorway in Britain. Includes junction diagrams.
网站简介：Part of the Institution of Highways and Transportation website. Includes history, development, and maps.
网站简介：Maintainer. Map, construction information, and traffic status.
网站简介：Provides for sponsorship in various states.
网站简介：Collection of postcards from the Mother Road.