In preparing a revised strip map, the original tracing on file with the Traffic Operations Division may be obtained and used where all data, other than speed check data shown thereon, are current.

A strip map containing out-of-date information should be considered obsolete

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New strip maps should be prepared when physical improvements of the roadway have been made or when changes in roadside development have occurred since the original strip map was prepared even though the speed checks and zone speeds may not change.