CFR > Title 23 - Highways > CHAPTER III—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > PART 1340—UNIFORM CRITERIA FOR STATE OBSERVATIONAL SURVEYS OF SEAT BELT USE > SUBPART B—Survey Design Requirements (§1340.4 to §1340.9) > 1340.6—Assignment of observation times.

1340.6—Assignment of observation times.

Code of Federal Regulations

Effective Date Note: At 76 FR 18056, Apr. 1, 2011, part 1340 was revised, effective May 2, 2011. For the convenience of the user, the revised text is set forth as follows: PART 1340—UNIFORM CRITERIA FOR STATE OBSERVATIONAL SURVEYS OF SEAT BELT USE § 1340.6 Assignment of observation times. (a) Daylight hours. All daylight hours between 7 a.m. and 6 p.m. for all days of the week shall be eligible for inclusion in the sample. (b) Random assignment. Except as provided in paragraph (c) of this section, the day-of the week and time-of-the-day shall be randomly assigned to observation sites. (c) Grouping of observation sites in close geographic proximity. Observations sites in close geographic proximity may be grouped to reduce data collection burdens if: (1) The first assignment of an observation site within the group is randomly selected; and (2) The assignment of other observations sites within the group is made in a manner that promotes administrative efficiency and timely completion of the survey.