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The objective of the study reported herein was to Selection of sampling rates depends mainly upon
in view of the magnitudes of other errors common
Published by The Ministry of Transportation
12-hour survey period 25 percent sampling 50 percent bidirectional AADT accuracy based on 50 bidirectional sampling rate bidirectional trip table Brokke calculated calibration phase condition cost of improvement daily variation error eastbound trip table error for 50 error for Station Errors due estimated trip tables factoring error HBW trips HOME-BASED interdistrict trip volume INTERDISTRICT VOLUME Figure interzonal inventory phase error locations marginal cost NLETS number of vehicles Observed bidirectional trip observed trip tables particular O-D percent and 25 percent bidirectional interviewing percent BSR percent error percent RMS error percent sample trip percent sampling rate personal vehicles processing cost reduction RMS errors obtained sample trip tables sampling errors obtained sampling techniques selected stations shown in Figure simulation and calibration Station 604 subsample Survey Station table for Station theoretical sampling errors total error total inventory phase transportation planning Trip Purpose trip tables based user cost vehicles passing volume of 100