Specifications include, but are not limited to: For Asphalt Concrete on Embankment Layer, the top half of the base course thickness shall be asphalt concrete. The remaining thickness of the base shall be the same type and construction as the top layer of the underlying embankment, treated layer, or subgrade, or in accordance with Section 203 for placement on existing ground. Do not place raw, untreated material between a treated layer and the asphalt concrete layer. In areas that are inaccessible for mixing and compacting, such as in turnouts, crossovers, and other isolated or irregular areas, full depth portland cement concrete or full depth asphalt concrete base course may be used in lieu of the specified Class II base course material with approval. When portland cement concrete is used, unless otherwise specified or approved by the engineer, the minimum thickness shall be 6 inches. Portland cement concrete shall be in accordance with Section 706, except as follows. Portland cement concrete thickness tolerances shall be in accordance with Section 601 and corrected in accordance with 302.12.2.3. Portland cement concrete width corrections shall be in accordance with 302.12.3.1. Any pay adjustment in portland cement concrete shall be in accordance with Table 901-5. A bond breaker is required between portland cement concrete base and portland cement concrete pavement. A bond breaker shall consist of a double application of curing compound or 2 layers of polyethylene sheeting. A 3 inch scored joint will be made to control cracking in the concrete base. The scored joints should be placed at the required surface joint locations. No load transfers will be required in the base slab. Drainage of all existing and constructed pavement structures shall be maintained at all times during construction at no additional cost to the Department. When base course is permeable, provide a base drain outlet consisting of non-plastic embankment (stone) and geotextile fabric, or as specified in the plans, in accordance with 203.09...