The Pankian Metaphor 3071

ref:

which makes repeated reference to the earlier postings ... partial extract from the content of previous posting:

misc ref on fuel tax:

misc road construction ref:

603.1 Introduction

The primary goal of the design of the pavement structural section is to provide a structurally stable and durable pavement and base system which, with a minimum of maintenance, will carry the projected traffic loading for the designated design period. This topic discusses the factors to be considered and procedures to be followed in developing a projection of truck traffic for design of the "pavement structure" or the structural section for specific projects.

Pavement structural sections are designed to carry the projected truck traffic considering the expanded truck traffic volume, mix, and the axle loads converted to 80 kN equivalent single axle loads (ESAL's) expected to occur during the design period. The effects on pavement life of pbuttenger cars, pickups, and two-axle trucks are considered to be negligible.

Traffic information that is required for structural section design includes axle loads, axle configurations, and number of applications. The results of the AASHO Road Test (performed in the early 1960's in Illinois) have shown that the damaging effect of the pbuttage of an axle load can be represented by a number of 80 kN ESAL's. For example, one application of a 53 kN single axle load was found to cause damage equal to an application of approximately 0.23 of an 80 kN single axle load, and four applications of a 53 kN single axle were found to cause the same damage (or reduction in serviceability) as one application of an 80 kN single axle.

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from the previous posting extract on the "design of pavement structural section" the paragraph:

Pavement structural sections are designed to carry the projected truck traffic considering the expanded truck traffic volume, mix, and the axle loads converted to 80 kN equivalent single axle loads (ESAL's) expected to occur during the design period. The effects on pavement life of pbuttenger cars, pickups, and two-axle trucks are considered to be negligible.

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the last paragraph in the referenced paragraph comments that

The effects on pavement life of pbuttenger cars, pickups, and two-axle trucks are considered to be negligible.

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