Search Help

Modifying a Search

  • Click the Filters button to see all available search fields.
  • When submitting searches, click the button after entering all search criteria, or hit the Enter button on your keyboard.
  • Add more criteria to narrow search results. Delete criteria to broaden search results.
  • Click the button to begin a new search.
  • Click the History button to re-run a previous search.

Text Field Searching

These rules apply to any plain text field on the Search Filters form.

  • For an exact match, enclose a phrase within quotes:
  • For a wild-card search, use an asterisk (*) after a partial word.
  • TRID will perform limited automatic stem searching when using quoted phrase searches.
  • Search example: retrieves technological forecasting, technological forecasts, technology forecasts.
  • For a Boolean search, use OR, AND, or NOT between words or phrases.
  • A nested search may be performed by enclosing term(s) within parentheses.
  • Search example:
  • Stop Words: The following words are ignored in any search or quoted phrase in order to reduce the size of the search index and increase search speed: about, also, an, and, another, any, are, as, at, be, because, been, being, between, both, but, by, came, can, come, could, did, do, does, each, else, for, from, get, got, has, had, he, have, her, here, him, himself, his, how, if, in, into, is, it, like, make, many, me, might, more, most, much, must, my, never, now, of, on, only, or, other, our, out, over, same, see, should, since, so, some, still, such, take, than, that, the, their, them, then, there, these, they, this, those, to, too, want, was, we, well, were, what, when, where, which, while, who, will, with, would, your.

Keyword Field

This field searches all of the indexed fields in TRID which include title, abstract, notes, index terms, subject areas, record accession numbers (both TRIS and ITRD), and authors.

Title Field

Enter one or more terms from a title or the exact title to search on a publication title.

Serial or Conference

Enter one or more terms to search for records from a serial or conference. Enclose the title within quotes to return only results from a specific serial or conference.

Subject Areas

Click the field or use the down arrow to select a TRB subject area to limit search results by a specific transportation mode, function, or activity. You may also start typing to filter the list, then use the arrow keys or highlight with the cursor to select a subject area. Multiple subject areas may be selected; simply repeat the process as for selecting the first subject area. If you select multiple subject areas, you can switch between OR/AND Boolean logic for your selections by selecting the appropriate radio button: Match Any Subject Listed or Match All Subjects Listed.

*Note that ITRD Subjects are only searchable in the keyword field

Paper, Report, Contract or Grant Numbers

Enter complete or partial terms to search for report, contract or grant numbers.

To search for multiple terms, use OR to separate search terms.


Select an entry to limit searches to records from a specific Source. A source is the organization or type of organization that provided the records to the TRID Database. Limiting to project records from Research in Progress (RIP) is also an option. Only one Source can be selected per search. If you need to limit your search to two or more Sources, repeat your search while selecting the appropriate Source, then use the Search History feature to combine those searches using the OR Boolean operator.

Index Term

Begin typing an index term. If the term is from the Transportation Research Thesaurus (TRT), matching terms will appear in a drop down list from which you can select terms. More than one term may be selected; in this case the default Boolean operator is OR.

Uncontrolled terms and ITRD Thesaurus terms do not appear in the drop down list but are still searchable in this field. To search uncontrolled terms or ITRD thesaurus terms, simply enter the terms on which you wish to search and press Enter.

To use Boolean logic and/or wildcards, enter the query without selecting any terms from the dropdown list.


Enter a partial or complete organization name to search among publishers, corporate authors, funding organizations, performing organizations, source organizations, or conference sponsors. You may need to use Boolean logic.


Enter a person's last/family name and first/given name or initial to search among authors and editors. You can use wildcards and Boolean logic to search across all matching names, including first names.

Note that a query for will return results for 'Smith, Robert,' 'Smith, Richard' and authors 'Smith and Robert' or other last/family and first/given names that begin with the letter R. It will not return results for 'Smith, Bob'. Please keep in mind that due to differences in indexing practices among the various contributors to the TRID Database, some records contain only first/given initials rather than full names.

Result Type

Select from the list to limit your search to publications, projects, monographs (reports, books, collections) or journal articles/conference papers, or a combination.

Limit results to free or fee-based full-text links

Checking this box will display only those results that have direct or indirect URL links to the full text document. Publishers may charge a fee for accessing the full text.

Language of Publication

Select specific languages to restrict results to records published in any of those languages. If you are unsure about the language of publication, it is best to leave this field blank.

Select Date Range

The default is set to search all dates. To narrow your search, select one of the preset buttons: , , , or use to specify a date range.

Date Range Type

The default is set to search on date of publication or date that a project started or will start.

Select Record Created Date to search by date on which records were initially entered into the Database.

Sort Options

Use these parameters to change the order in which results are displayed.

Records per Page

Select the number of results shown on each page. The default is set to display 25 records.

Results View

Mark Records

You can print, e-mail, save, or view selected records during the course of a session by marking one or more records. Use the Mark: Page | All | None options at the top of the results to select all the records on a page or the entire record set. Marked records will persist across searches, allowing you to combine many different results into a single collection. To clear your marked records, use the Clear link above the search results on the top right.

Use the checkboxes in the left pane to mark individual records.

In mobile mode, navigate back to the results list when viewing individual records by clicking Results in the upper left portion of your screen.


Use the page navigation to move to the next or previous page of results. You can also jump to a page by entering the page number into the page number field and pressing enter.

Publication Flags

In your results list, an orange open access icon appears in front of some titles that are freely available online. These articles are from journals that provide all content under an open access license such as Creative Commons. This icon will also be visible next to the title when viewing or opening a record. Additionally, a Publication Flags field will be visible below the Serial field in the record view:

The Elsevier Science Direct Full Text Entitlement API is active in TRID. When full text is available from Elsevier journals, either on an open access basis or because your institution subscribes to the full text of that journal, the Elsevier icon will appear in the record view as well as in the Publication Flags.

Marked Records


  • Print marked records in various formats.
  • Email marked records to yourself or another person.
  • Save marked records for other uses including importing bibliographic software like RefWorks, EndNote, or ProCite.
  • Clear your marked record collection.


Plain text format for a reference citation.
Citation & Abstract
Plain text format for a reference citation which also includes the record abstract or description.
Used to import into bibliographic software like RefWorks, EndNote, Zotero or ProCite.
Microsoft Word
Full record output in Microsoft Word document format. Records are separated by page breaks.
Structured output of full record data in XML for use in data transfer or import.
Full record output as a web page for print or display in a browser.