The work zones considered in this analysis refer to

scheduled, significant work zone events

, including any scheduled closures of one or more travel lanes or shoulders. These work zones typically last multiple days or weeks and may involve multiple stages, with a combination of shoulder and lane closure parameters. Minor maintenance activities, such as pavement patching or guardrail repair, is treated as an incident event due to the shortterm impacts. A major construction project that occurs throughout the entire analysis period is a global factor and applied to every scenario; therefore, it is recommended that long-term work zone impacts be considered during the freeway capacity analysis and development of the base scenario, described in

Chapter 9

of this manual.

When accounting for work zones across a RRP, the base freeway capacity is adjusted for the representative portion of the analysis scenarios. For example, if a work zone that closes one lane is planned for three months of a 12-month RRP, the scenarios generated for those three months are analyzed with one fewer lane than the other scenarios analyzed as part of the RRP. For a step-by-step guide of conducting a work zone analysis, refer to Chapter 10 Section 4 of the HCM