Chapter 7 of 85% of exam

Roadwork and Paving

Roadwork and Paving is about 5% of the exam, and CSLB lists one topic: base for highways, roads and parking lots. The PrepPass CSLB General Engineering (A) Study Guide covers this section in depth, with worked examples, named traps and a chapter quiz.

Aggregate base

Base goes on a compacted subgrade at grade, in thin layers, compacted to 95%.

Layers

Base over 0.50 foot is placed in at least two approximately equal layers; no compacted layer over 0.50 foot.

Caltrans Standard Specifications 2025, 26-1.03D

Tolerance

Finished base within 0.05 foot of grade.

Caltrans Standard Specifications 2025, 26-1.03E

Lime treatment

Apply above 35 degrees F, keep moisture above optimum, mellow 36 hours, compact to 95%.

Caltrans Standard Specifications 2025, 24-2.03

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