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KEY ASPECTS OF NAVIGATION- Route Number
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Definition
Route Number is the database representation of the route number(s)
assigned to a particular transportation element by an official authority.
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Description
Route Number generally consists of a prefix (generally alphabetic characters written in upper cases), a number and, in some cases, a suffix.
The prefix (= alphabetic character(s)) and the numeral can possibly be separated by a blank ( ), a hyphen (-), an asterisk (*),..., but they are never separated by a slash. In some cases the numeral of a route number is followed by a suffix.
E.g. E17N-IIISS 248N137*dD54e. The first alphabetic character(s) of a route number contained in
Route Number refers to the transportation network to which the route belongs. These alphabetic characters can differ for different countries. E.g. N1 (Australia) refer to a national route.
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General Capturing Rules
Route Number shall be captured for captured Road Elements and Ferry Connection.
Route Number shall be captured as indicated on signposts. Continuity should be assured.
Internal connectors shall have the same Route Numbers as its corresponding Freeway/Dual Carriageway.
Route Number shall be captured for a captured Road Element related to a Major Slip Road or a Parallel Road, only to ensure the continuity of identical route numbers.
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General Capturing Rules
Route number continuity at Major Slip Roads.
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General Capturing Rules
Route Numbers shall be captured on the complete Roundabout, to ensure the continuity of identical Route Numbers. If a Route Number starts or ends at a roundabout, it shall not be captured on the Roundabout.
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General Capturing Rules
Route Number of a Road Element representing an abstract topological connection inside an Enclosed Traffic Area shall be captured as the Route Number of the Road Elements joining the Enclosed Traffic Area. There is continuation of Route Number inside an Enclosed Traffic Area.
A Route Number on a small Slip Road is not necessary. Certain Route Number gaps can occur if they represent the real
world situation.
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Route Number Type
Definition:
Route Number Type is the database representation of the characteristics of a
Route Number signpost.
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Description
Route Number Type shall be used for display purposes: the types will be used for displaying Route Number icons and to filter Route Numbers for small-scale maps.
Route Number Type reflects the road sign, used by an official authority, to indicate its Route Numbers. A type represents the characteristics of the signpost. Route Number Type is a functional differentiation between signs, based upon the color of the characters and signs, the shape and the framework.
The Route Number Type will correspond with a number, which reflects the country depending situation.
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General Capturing Rule
Route Number Type shall be captured for the most important Route Number, as mentioned in the reference list provided in “Route Number Shields” in next slide.
The Reference List indicates that the decisive factor the Route Number prefix is. Exceptions are possible.
E.g.1. Type 4 in Australia indicates ‘State Highway’ with prefix S.
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Route Number Shields
Route Number shields used for route numbers on the Australian road networks.
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Route Number Shields
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