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Contents

I-Organization
II-Duties of resident engineers and inspectors
III-Daily routine of engineers in charge of road construction
IV-Reports
V-Water supply
VI-Road bed
VII-Laying pavement
VIII-Cement
IX-Materials
X-Central mixing plants
XI-Finishing concrete pavements
XII-Special sections
XIII-Curing
XIV-Bituminous filled brick construction
XV-Bituminous concrete pavements
XVI-Gravel roads
XVII-Macadam roads
XVIII-Bituminous macadam roads
XIX-Earth roads
XX-Oiled earth roads
XXI-Shoulders and side ditches
XXII-Acceptance of work
XXIII-Payment estimates
XXIV-Detour and barricade signs

Preface

The purpose of this bulletin is to set forth briefly the requirements of the Department of Public Works and Buildings, in the construction of various types of roads. It must be understood that all preliminary work in the location of right-of-way, surveys, plans and specifications, regardless of the time or talent employed in the preparation of the work, may be useless if the construction is not intelligently and fairly executed. During the next ten years it is estimated that one hundred million dollars will be spent for road improvement in Illinois. It is very important, therefore, that all work be done in accordance with approved principles and under intelligent supervision in order that the burden imposed by future maintenance may be reduced to a minimum.

No set of rules and no set of specifications can be written to cover completely all conditions which may arise. Experience, judgment, and integrity in carrying out the requirements of the specifications must dictate the answer to many doubtful questions that may arise in the construction of the work.

It is hoped, therefore, that this bulletin may offer suggestions that will aid both the engineer and the contractor in the successful completion of his work.

The purpose of the revised road and bridge law is to provide a competent organization for the efficient handling of all road and bridge work in the State. Under the Civil Administrative Code the Director of the Department of Public Works and Buildings directs the work of the Division of Highways. The Superintendent and Chief Highway Engineer of the Division of Highways in conjunction with the Director and the Board of Highway Advisors determine the location and direct the design, construction, and maintenance of all State road and bridge work.

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