WordNet (r) 3.0 (2006):

road map
    n 1: a detailed plan or explanation to guide you in setting
         standards or determining a course of action; "the president
         said he had a road map for normalizing relations with
         Vietnam" [syn: road map, guideline]
    2: a map showing roads (for automobile travel)

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "road map":
   Baedeker, Lambert conformal projection, Mercator projection,
   Miller projection, Yellow Pages, aeronautical chart,
   astronomical chart, atlas, azimuthal equidistant projection,
   azimuthal projection, bibliography, business directory,
   cartographer, cartography, catalog, celestial chart,
   celestial globe, chart, checklist, chorographer, chorography,
   city directory, classified directory, climatic chart,
   conic projection, contour line, contour map,
   cylindrical projection, directory, finding list,
   general reference map, globe, gnomonic projection, graphic scale,
   grid line, guidebook, hachure, handbook, handlist,
   heliographic chart, hydrographic chart, index, isoline, itinerary,
   latitude, layer tint, legend, longitude, map, map maker,
   map projection, mapper, meridian, parallel, phone book,
   photogrammetrist, photogrammetry, photomap, phototopography,
   physical map, political map, polyconic projection, projection,
   reference book, relief map, representative fraction, roadbook,
   scale, sinusoidal projection, special map, telephone book,
   telephone directory, terrain map, terrestrial globe, thematic map,
   topographer, topographic chart, topography, transportation map,
   weather chart, weather map