A straight-line diagram is a diagram of a road where 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. Subway lines also frequently employ straight-line diagrams.
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

Portable Document Format

Portable Document Format is an open standard for document exchange. This file format, created by Adobe Systems in 1993, is used for representing documents in a manner independent of application software, hardware, and operating systems....

 and TIFF

Tagged Image File Format

TIFF is a file format for storing images, popular among graphic artists, the publishing industry, and both amateur and professional photographers in general. As of 2009, it is under the control of Adobe Systems...

.

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

External links

• Colorado Department of Transportation SLDs
• New Jersey Department of Transportation SLDs
• North Carolina Department of Transportation SLDs
• Ohio Department of Transportation SLDs
• Index of Australian strip maps at the South Australian Royal Automobile Association website
• Sample South Australian RAA strip map from Adelaide to Clare