: Minimum California Bearing Ratio (CBR) requirements for subbase layers.

Many engineers compare the Tanzanian standard to:

in June 2000, it was developed in collaboration with the Norwegian Public Roads Administration and the Central Materials Laboratory. Core Structure and Scope

As of 2025, no complete replacement has been issued. TANROADS has published “Pavement and Materials Design Manual” (2019) and “Bridge Design Manual” (2021) as complementary, not replacing, the 2000 spec.

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