For which of the following is sampling and testing NOT generally required according to the text?

Sampling and testing are essential components in quality management systems for roadway construction. However, they are not uniformly required across all types of pavement construction activities.

In the context of paving in irregular areas, this activity typically involves localized work that often includes patches, repairs, or adjustments to existing infrastructure. Due to the nature of the work, which often occurs in small or irregularly shaped sections, the scale and variability of these patches generally do not warrant the same rigorous sampling and testing process that would be applied to more uniform and extensive paving projects. This can be attributed to practical considerations; smaller areas may not provide sufficient material or represent a larger batch that would make extensive testing beneficial or necessary.

In contrast, other options like collector lanes and full-width travel lanes greater than 4.0 feet commonly involve larger, more standardized paving sections where consistency and quality are crucial. Similarly, temporary pavements, even though they may seem less critical, must also meet certain standards of compaction and stability to ensure safety and performance.

Therefore, paving in irregular areas stands out as the correct answer, as these situations typically do not require the same level of stringent sampling and testing protocols that would apply to more significant, homogeneous roadway constructions.