Research Article

Predicting Freeway Work Zone Capacity Distribution Based on Logistic Speed-Density Models

Table 1

Summary of work zone configurations.

CityWork ZoneTruck PercentageSpeed limit (mph)Work TypeControl TypeBarrier TypeArea TypeWork Time
OriginalWork zone

Quad CitiesI80 WB29.63%6555Bridge deck overlayLane closurePlastic DrumUrbanDaylight
Quad CitiesI80 EB29%6555Bridge deck overlayLane closurePlastic DrumUrbanDaylight
Sioux CityI29 NB13.24%6555Pavement ReconstructionLane closure and shiftPlastic DrumUrbanDaylight
Iowa CityI380 NB15.97%7055Bridge deck overlayLane closure /shiftPlastic DrumUrbanDaylight
Council BluffsI80/I29 WB17.23%6555Road constructionLane closure /shiftConcreteUrbanDaylight