310.35  Use of fund.
  The secondary road research fund shall be used by the department solely for the purpose of financing engineering studies and research projects which have as their objective the more efficient use of funds and materials that are available for the construction and maintenance of secondary roads, including bridges and culverts located thereon.
[C50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §310.35]