Straight-line diagram

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A straight-line diagram (abbreviated SLD) is a diagram of a road in which the road is shown as a straight line. Such diagrams are usually produced by a highway department, and display features along the road, including bridges and intersecting roads. Rows below the diagram show data about the road, usually including speed limit, number of lanes, bridge numbers, and historical data, among other data.

An internal SLD viewing system may also include links to other internal data, including photos or plans. Public SLDs are distributed in formats including PDF and TIFF.

In Australia "Strip maps", which serve a similar function, are distributed by state automobile associations.

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