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From page 36... ... Getting Started with RPZ_RAT 29 within the RPZ, and the average traveling speed, and RPZ_RAT will derive an estimate for the average population density accordingly. Question: I want to analyze the risk for a worst-case scenario when an aircraft crashes into a highway during the rush hour. Read the entire page →
From page 37... ... 30 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide which include aircraft types identified by the FAA codes. Read the entire page →
From page 38... ... Getting Started with RPZ_RAT 31 Figure 4.10. Legend window. Read the entire page →
From page 39... ... 32 C H A P T E R 5 On completion of the analysis, the software generates two sets of outputs: crash likelihood contours and an Excel file that contains various details and graphics. When the analysis is complete, the software prompts the user to name and save the Excel file. Read the entire page →
From page 40... ... Understanding Analysis Results 33 for every type of event and for every RPZ. Four types of events are modeled in this study: landing overrun, landing undershoot, takeoff overrun, and takeoff overshoot. Read the entire page →
From page 41... ... 34 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide When runway thresholds are NOT displaced, a takeoff overrun accident is more likely to occur in the RPZ than other accident types. Read the entire page →
From page 42... ... Understanding Analysis Results 35 Fifth Table: Land Use Risk Results The last table in the summary sheet of the Excel output file presents the risk associated with each land use. The table notes the RPZ(s) Read the entire page →
From page 43... ... 36 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide RPZ 15 RWY 15 Approach RPZ RWY parr RPZ Figure 5.2. Read the entire page →
From page 44... ... 37 C H A P T E R 6 6.1 Case Study Purpose The Runway Protection Zone Risk Assessment Tool (RPZ_RAT) has been developed as a quantitative tool to estimate risks to the populations on the ground and within the runway protection zone (RPZ) Read the entire page →
From page 45... ... 38 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide witness an accident when everything else is equal. Read the entire page →
From page 46... ... Case Study Airport 39 6.3 Preparing Input Files for RPZ_RAT To develop estimates of RPZ risk, the RPZ_RAT requires input data files for the airport operations and the weather conditions that occurred during the study period. The data are loaded into the model in a Normal Operation Data (NOD) Read the entire page →
From page 47... ... 40 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide Estimation of VFR Operations The ATADS data indicated that 32,130 civilian operations occurred during the sample period – 16,812 IFR operations and 15,318 VFR operations. Read the entire page →
From page 48... ... Case Study Airport 41 Time FAA_Code Runway Designation Bound (Arrival, Departure) Flight Category Flight Type (Domestic, International) Read the entire page →
From page 49... ... 42 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide discrepancy could have been addressed through another iterative adjustment in the average daily schedule, the deviation was considered small enough to allow the case study analysis to move ahead. Read the entire page →
From page 50... ... Case Study Airport 43 visibility, wind direction, and wind speed attributes. In these cases, average values were substituted, based on the nearest adjacent times for which data were available. Read the entire page →
From page 51... ... 44 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide For railways, average annual daily passage, length of segment within the RPZ, average speed, average length of trains, and average ridership per train can be entered to generate estimates of daily presence of trains in the RPZ and average population of the corridor segment. Read the entire page →
From page 52... ... Case Study Airport 45 Highway Zulu northbound and a very small part of the southbound pass through the RPZ with an AADT of 4,000. Overall, nine separate land uses were identified in this RPZ and were entered into the RPZ_RAT. Read the entire page →
From page 53... ... 46 Runway Protection Zones (RPZs) Risk Assessment Tool Users' Guide Figure 6.4. Read the entire page →
From page 54... ... Case Study Airport 47 is 0.25 miles long with a 45 mph speed limit. With an AADT of 6,113, RPZ_RAT calculates a population density of 5 × 10–05 persons per square foot for the roadway. Read the entire page →

From page 36...

... Getting Started with RPZ_RAT 29 within the RPZ, and the average traveling speed, and RPZ_RAT will derive an estimate for the average population density accordingly. Question: I want to analyze the risk for a worst-case scenario when an aircraft crashes into a highway during the rush hour.