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Phrase Searching

To search for an exact phrase enclose the entire phrase in double quotes ("Phrase").

If you enter:	You retrieve:
"traffic signal timing"	records containing the exact phrase "traffic signal timing" Title Example: Adverse weather traffic signal timing
traffic signal timing	records containing the words traffic, signal, and timing Title Example: Study on signal timing of hybrid traffic flow

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TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.