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From page 110... ... 110 Control Strategies "Control strategies" refers to the traffic control approaches employed to efficiently and safely accommodate road users within the work zone or the adjoining corridor, while providing adequate access to the roadway for the required construction, maintenance, or utility work to be performed. This section discusses the following control strategies: • Full road closure • Night work • Two-way traffic on one side of a divided facility (i.e., crossover) Read the entire page →
From page 111... ... Control Strategies 111 • Viable alternate routes exist and a full road closure will accelerate construction. • The project requires reduced construction time. Read the entire page →
From page 112... ... 112 Strategies for Work Zone Transportation Management Plans unfavorable ratings can result in a request for more information, rejection of the proposed full closure, or significant modification to characteristics of the closure. Read the entire page →
From page 113... ... Control Strategies 113 6.1.4 Expected Effectiveness The FHWA study, Full Road Closure for Work Zone Operations (2003) , examined six projects that used full road closures and reported a significant reduction in project duration (Figure 6.2) Read the entire page →
From page 114... ... 114 Strategies for Work Zone Transportation Management Plans • Full-closure projects are often scheduled on a 24-hour work basis, so there is potential for adverse impacts to local residents, including noise and light pollution. • Agencies and public information campaigns should encourage road users to consider public transportation alternatives on detour routes, where available. Read the entire page →
From page 115... ... Control Strategies 115 projects in the Detroit area during the 2002 and 2003 construction seasons. The traffic in the direction of the closure was detoured off the freeway. Read the entire page →
From page 116... ... 116 Strategies for Work Zone Transportation Management Plans McGowen, T The Biggest Freeway Closure in the Car Capital of the World: A Brief Case Study, Journal of the Transportation Research Forum, Vol. Read the entire page →
From page 117... ... Control Strategies 117 The cost module consists of three different cost models -- a traffic delay model (Figure 6.3) , an accident cost model (Figure 6.4) Read the entire page →
From page 118... ... 118 Strategies for Work Zone Transportation Management Plans with the total cost to make the decision. Agencies can use different methods, depending on the decision-maker's preference and the particular situation, to combine the score of each factor and its relative importance weight to find the combined score. Read the entire page →
From page 119... ... Control Strategies 119 6.2.4 Expected Effectiveness NCHRP Report 627: Traffic Safety Evaluation of Nighttime and Daytime Work Zones (Ullman et al. Read the entire page →
From page 120... ... 120 Strategies for Work Zone Transportation Management Plans traffic crashes involving workers, construction vehicles or equipment, and construction materials and debris (both intrusion and non-intrusion crashes) comprise a greater percentage of crashes at night than during the day. Read the entire page →
From page 121... ... Control Strategies 121 and worker safety, impacts on neighboring communities and businesses, air quality, and energy conservation. Therefore, agencies need to consider all these important aspects for a specific situation before they can make an informed decision on nighttime construction. Read the entire page →
From page 122... ... 122 Strategies for Work Zone Transportation Management Plans 6.2.10 Resources and References Antonucci, N Read the entire page →
From page 123... ... Control Strategies 123 6.3.2 When to Use The use of crossover should be considered under the following situations: • The project has a long duration. • Opposing traffic lanes do not carry peak hour traffic. Read the entire page →
From page 124... ... 124 Strategies for Work Zone Transportation Management Plans • Will a restricted section create difficulties for emergency vehicles when passing through or responding to accidents in, or downstream of, a crossover segment? Pullouts at 1-mi intervals are suggested for disabled vehicles, incident management staging, and law enforcement vehicles. Read the entire page →
From page 125... ... Control Strategies 125 • Temporary barriers are used to separate the two directions of traffic. Both directions of traffic need appropriate deflection distance; if this is not possible, barriers need to be pinned as per state standards. Read the entire page →

From page 110...

... 110 Control Strategies "Control strategies" refers to the traffic control approaches employed to efficiently and safely accommodate road users within the work zone or the adjoining corridor, while providing adequate access to the roadway for the required construction, maintenance, or utility work to be performed. This section discusses the following control strategies: • Full road closure • Night work • Two-way traffic on one side of a divided facility (i.e., crossover)