This report reviews previous studies of work zone capacity, summarizes the analysis of new capacity data collected as part of Study 1108, and presents recommendations for estimating the capacity of … [Read more...] about Updated Short-Term Freeway Work Zone Lane Closure Capacity Values
Work Zones
Field Studies of Temporary Pavement Markings for Work Zones on Two-Lane Rural Highways
In response to FHWA's proposed rule requiring that all states use 4-ft pavement markings on 40-ft centers as temporary markings in highway work zones, NCHRP awarded a research contract to the Texas … [Read more...] about Field Studies of Temporary Pavement Markings for Work Zones on Two-Lane Rural Highways
Delineation of Temporary Barriers in Work Zones, Volume II
The objective of the present study was to evaluate the effectiveness of various delineation systems for use on construction sites. It was determined that vertical panels and reflective cylinders were … [Read more...] about Delineation of Temporary Barriers in Work Zones, Volume II
End Treatment for Concrete Barriers Used in Work Zones
An end treatment was developed and crash tested to shield the ends of the concrete safety shape barrier (CSSB) and other narrow rigid objects. It was designed as a temporary treatment for use … [Read more...] about End Treatment for Concrete Barriers Used in Work Zones
High Visibility Garments for Use in Work Zones
The increase in accidents involving personnel in construction and maintenance zones prompted a review of the use of high visibility safety garments. This review led to laboratory and field studies … [Read more...] about High Visibility Garments for Use in Work Zones
Model to Calculate the Road User Costs at Work Zones
This report presents a model, QUEWZ, which can be used to calculate the user costs resulting from lane closures through a work zone. QUEWZ calculates the delay costs and speed-change cycling costs of … [Read more...] about Model to Calculate the Road User Costs at Work Zones