United States Department of Transportation

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Table 9 - LOS Designation in the Highway Capacity Manual (1994)

Table 9 - LOS Designation in the Highway Capacity Manual (1994)

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Level of service Stopped time per vehicle (STV; seconds/vehicle) A STV ≤ 5 B 5 < STV ≤ 15 C 15 < STV ≤ 25 D...

Figure 4 - Comparison of CORSIM with Field Variation (Eastbound Ohio at LaSalle, Morning Peak)

Figure 4 - Comparison of CORSIM with Field Variation (Eastbound Ohio at LaSalle, Morning Peak)

Excel | CSV | Table Version

Note: Histogram is based on 100 CORSIM runs.

Statistically-Based Validation of Computer Simulation Models in Traffic Operations and Management - Discussion 2

Statistically-Based Validation of Computer Simulation Models in Traffic Operations and Management - Discussion 2

MAX D. MORRIS* Iowa State University

I congratulate and thank Sacks et al. for an interesting and thoughtful case study of model validation in an important...

Figure 2 - Link Throughput at Eastbound Ohio/LaSalle (8-9 AM)

Figure 2 - Link Throughput at Eastbound Ohio/LaSalle (8-9 AM)

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Note: Histogram is based on 100 CORSIM runs.

Figure 3 - Link Throughput at Westbound Grand/Wells (5-6 PM)

Figure 3 - Link Throughput at Westbound Grand/Wells (5-6 PM)

Excel | CSV | Table Version

Note: Histogram is based on 100 CORSIM runs.

Figure 4 - Comparison of CORSIM with Field Variation (Eastbound Ohio at LaSalle, Morning Peak)

Figure 4 - Comparison of CORSIM with Field Variation (Eastbound Ohio at LaSalle, Morning Peak)

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Time Interval Trips (vehicles) Field CORSIM 1 117 109 2 121 109 3 116...

Figure 7 - Link STVS at Northbound LaSalle/Ontario

Figure 7 - Link STVS at Northbound LaSalle/Ontario

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Stop time (stopped vehicles; seconds/vehicle) Frequency 21 0 22 1 23 12 24 19 25 31 26 21...

Table 3 - Comparison of Stop Rates on Key Links

Table 3 - Comparison of Stop Rates on Key Links

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Period Link Field (percent) CORSIM (percent) Average CORSIM (percent) s.d.* 8-9 AM SB LaSalle at Ohio 50 30 1.8 8-9 AM EB Ohio at LaSalle 56 35...

Statistically-Based Validation of Computer Simulation Models in Traffic Operations and Management

Statistically-Based Validation of Computer Simulation Models in Traffic Operations and Management

Jerome Sacks* National Institute of Statistical Sciences and Duke University

Nagui M. Rouphail North Carolina State University

Byungkyu (Brian) Park University of Virginia...

Figure 5 - CORSIM Variation vs. Field (Eastbound Ohio at LaSalle, Morning Peak)

Figure 5 - CORSIM Variation vs. Field (Eastbound Ohio at LaSalle, Morning Peak)

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Variation of trips for every 2-cycle Frequency 40 0 60 4 80 6 100 15 120 11...