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B-1 This appendix contains instructions for viewing the NCHRP 24-26 questionnaire responses databases, the survey questionnaire, and the list of respondents to the survey. It is available in NCHRP Web-Only Document 148. It can be found on the TRB website (www.trb.org) by search- ing for âNCHRP Web-Only Document 148â. A P P E N D I X B Survey of Practitioners