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From page 70... ... 70 Introduction The objective of Task 7 was to collect crash, roadway, and traffic-characteristic data as defined in the study design. This project leveraged existing datasets (as described in Chapter 3) Read the entire page →
From page 71... ... Data Collection 71 and Minnesota included sites for all Highway Safety Manual (1st Edition) urban and suburban segment types: two-lane undivided roadway segment (2U) Read the entire page →
From page 72... ... 72 Application of Crash Modification Factors for Access Management directly. As such, the project team had to develop an alternative method to locate these sites quickly and reliably. Read the entire page →
From page 73... ... Data Collection 73 Step 3: Identify Location of Interest in Google Earth Using milepost markers in Google Earth, the project team could identify the exact location of each intersection or the beginning and ending mileposts of each segment from the NCHRP Project 17-62 data file. Figure 26 shows a screenshot of the Ohio intersection data spreadsheet. Read the entire page →
From page 74... ... 74 Application of Crash Modification Factors for Access Management Step 4: Collect Access Management Features After locating and confirming the intersection or segment of interest, the project team verified the key information such as intersection configuration (i.e., number of legs) and traffic control type (i.e., stop-controlled or signalized) Read the entire page →
From page 75... ... Data Collection 75 • CR_1_RTL_EXCLUSIVE: number of lanes on the first minor approach toward the intersection that are right turn only. Vehicles are not permitted to proceed through the intersection from these lanes. Read the entire page →
From page 76... ... 76 Application of Crash Modification Factors for Access Management Site Type Number of Sites MV KABCO Crashes MV KABC Crashes MV O Crashes SV KABCO Crashes SV KABC Crashes SV O Crashes 3ST 1,792 3,319 982 2,337 803 253 550 4ST 439 1,325 477 848 208 55 153 3SG 218 2,217 478 1,739 158 42 116 4SG 488 5,630 1,403 4,227 335 90 245 MV = multivehicle, SV = single-vehicle. Table 59. Read the entire page →
From page 77... ... Data Collection 77 Site Type Number of Sites MV KABCO Crashes MV KABC Crashes MV O Crashes SV KABCO Crashes SV KABC Crashes SV O Crashes 3ST 52 259 79 180 45 23 22 4ST 36 386 152 234 38 14 24 3SG 19 516 137 379 37 12 25 4SG 102 5,793 1,772 4,021 256 100 156 MV = multivehicle, SV = single-vehicle. Table 60. Read the entire page →
From page 78... ... 78 Application of Crash Modification Factors for Access Management Variable 3ST 4ST 3SG 4SG Major Road AADT Min – 67 Max – 45,733 Mean – 7,682 Min – 335 Max – 29,375 Mean – 8,505 Min – 6,650 Max – 32,208 Mean – 14,848 Min – 3,500 Max – 47,063 Mean – 19,754 Minor Road AADT Min – 18 Max – 9,500 Mean – 1,764 Min – 10 Max – 8,625 Mean – 1,245 Min – 2,200 Max – 13,000 Mean – 6,821 Min – 15 Max – 33,625 Mean – 10,053 Pedestrian Volume n/a n/a n/a n/a Approaches with Left-Turn Lanes 0 – 42 1 – 9 2 – 1 3 – 0 4 – 0 0 – 27 1 – 1 2 – 8 3 – 0 4 – 0 0 – 2 1 – 4 2 – 12 3 – 1 4 – 0 0 – 6 1 – 2 2 – 21 3 – 8 4 – 65 Approaches with Right-Turn Lanes 0 – 43 1 – 6 2 – 2 3 – 1 4 – 0 0 – 31 1 – 5 2 – 0 3 – 0 4 – 0 0 – 1 1 – 4 2 – 14 3 – 0 4 – 0 0 – 25 1 – 21 2 – 30 3 – 13 4 – 13 Lighting Yes – 22No – 30 Yes – 18 No – 18 Yes – 9 No – 10 Yes – 77 No – 25 Left-Turn Phasing1 n/a n/a Permitted – 0 Protected – 19 Prot.-Perm. – 0 Permitted – 12 Protected – 52 Prot.-Perm. Read the entire page →
From page 79... ... Data Collection 79 Site Type No. Sites No. Read the entire page →
From page 80... ... 80 Application of Crash Modification Factors for Access Management Variable 2U 3T 4D 4U 5T Length (mi.) Min – 0.101 Max – 1.054 Mean – 0.206 Min – 0.100 Max – 0.487 Mean – 0.165 Min – 0.101 Max – 0.646 Mean – 0.179 Min – 0.103 Max – 0.524 Mean – 0.162 Min – 0.101 Max – 0.361 Mean – 0.166 AADT Min – 777 Max – 22,932 Mean – 10,019 Min – 3,209 Max – 16,561 Mean – 11,044 Min – 3,529 Max – 52,830 Mean – 20,791 Min – 4,812 Max – 29,316 Mean – 10,399 Min – 6,705 Max – 35,770 Mean – 16,551 Proportion of Curb Length with OnStreet Parking Min – 0.00 Max – 0.78 Mean – 0.03 Min – 0.00 Max – 0.80 Mean – 0.03 Min – 0.00 Max – 1.65 Mean – 0.03 Min – 0.00 Max – 0.27 Mean – 0.00 Min – 0.00 Max – 0.00 Mean – 0.00 Roadside Fixed Object Density (per mile) Read the entire page →

From page 70...

... 70 Introduction The objective of Task 7 was to collect crash, roadway, and traffic-characteristic data as defined in the study design. This project leveraged existing datasets (as described in Chapter 3)

Read the entire page →

From page 71...

... Data Collection 71 and Minnesota included sites for all Highway Safety Manual (1st Edition) urban and suburban segment types: two-lane undivided roadway segment (2U)

Read the entire page →

From page 72...

... 72 Application of Crash Modification Factors for Access Management directly. As such, the project team had to develop an alternative method to locate these sites quickly and reliably.

Read the entire page →

From page 73...

... Data Collection 73 Step 3: Identify Location of Interest in Google Earth Using milepost markers in Google Earth, the project team could identify the exact location of each intersection or the beginning and ending mileposts of each segment from the NCHRP Project 17-62 data file. Figure 26 shows a screenshot of the Ohio intersection data spreadsheet.

Read the entire page →

From page 74...

... 74 Application of Crash Modification Factors for Access Management Step 4: Collect Access Management Features After locating and confirming the intersection or segment of interest, the project team verified the key information such as intersection configuration (i.e., number of legs) and traffic control type (i.e., stop-controlled or signalized)

Read the entire page →

From page 75...

... Data Collection 75 • CR_1_RTL_EXCLUSIVE: number of lanes on the first minor approach toward the intersection that are right turn only. Vehicles are not permitted to proceed through the intersection from these lanes.

Read the entire page →

From page 76...

... 76 Application of Crash Modification Factors for Access Management Site Type Number of Sites MV KABCO Crashes MV KABC Crashes MV O Crashes SV KABCO Crashes SV KABC Crashes SV O Crashes 3ST 1,792 3,319 982 2,337 803 253 550 4ST 439 1,325 477 848 208 55 153 3SG 218 2,217 478 1,739 158 42 116 4SG 488 5,630 1,403 4,227 335 90 245 MV = multivehicle, SV = single-vehicle. Table 59.

Read the entire page →

From page 77...

... Data Collection 77 Site Type Number of Sites MV KABCO Crashes MV KABC Crashes MV O Crashes SV KABCO Crashes SV KABC Crashes SV O Crashes 3ST 52 259 79 180 45 23 22 4ST 36 386 152 234 38 14 24 3SG 19 516 137 379 37 12 25 4SG 102 5,793 1,772 4,021 256 100 156 MV = multivehicle, SV = single-vehicle. Table 60.

Read the entire page →

From page 78...

... 78 Application of Crash Modification Factors for Access Management Variable 3ST 4ST 3SG 4SG Major Road AADT Min – 67 Max – 45,733 Mean – 7,682 Min – 335 Max – 29,375 Mean – 8,505 Min – 6,650 Max – 32,208 Mean – 14,848 Min – 3,500 Max – 47,063 Mean – 19,754 Minor Road AADT Min – 18 Max – 9,500 Mean – 1,764 Min – 10 Max – 8,625 Mean – 1,245 Min – 2,200 Max – 13,000 Mean – 6,821 Min – 15 Max – 33,625 Mean – 10,053 Pedestrian Volume n/a n/a n/a n/a Approaches with Left-Turn Lanes 0 – 42 1 – 9 2 – 1 3 – 0 4 – 0 0 – 27 1 – 1 2 – 8 3 – 0 4 – 0 0 – 2 1 – 4 2 – 12 3 – 1 4 – 0 0 – 6 1 – 2 2 – 21 3 – 8 4 – 65 Approaches with Right-Turn Lanes 0 – 43 1 – 6 2 – 2 3 – 1 4 – 0 0 – 31 1 – 5 2 – 0 3 – 0 4 – 0 0 – 1 1 – 4 2 – 14 3 – 0 4 – 0 0 – 25 1 – 21 2 – 30 3 – 13 4 – 13 Lighting Yes – 22No – 30 Yes – 18 No – 18 Yes – 9 No – 10 Yes – 77 No – 25 Left-Turn Phasing1 n/a n/a Permitted – 0 Protected – 19 Prot.-Perm. – 0 Permitted – 12 Protected – 52 Prot.-Perm.

Read the entire page →

From page 79...

... Data Collection 79 Site Type No. Sites No.

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From page 80...

... 80 Application of Crash Modification Factors for Access Management Variable 2U 3T 4D 4U 5T Length (mi.) Min – 0.101 Max – 1.054 Mean – 0.206 Min – 0.100 Max – 0.487 Mean – 0.165 Min – 0.101 Max – 0.646 Mean – 0.179 Min – 0.103 Max – 0.524 Mean – 0.162 Min – 0.101 Max – 0.361 Mean – 0.166 AADT Min – 777 Max – 22,932 Mean – 10,019 Min – 3,209 Max – 16,561 Mean – 11,044 Min – 3,529 Max – 52,830 Mean – 20,791 Min – 4,812 Max – 29,316 Mean – 10,399 Min – 6,705 Max – 35,770 Mean – 16,551 Proportion of Curb Length with OnStreet Parking Min – 0.00 Max – 0.78 Mean – 0.03 Min – 0.00 Max – 0.80 Mean – 0.03 Min – 0.00 Max – 1.65 Mean – 0.03 Min – 0.00 Max – 0.27 Mean – 0.00 Min – 0.00 Max – 0.00 Mean – 0.00 Roadside Fixed Object Density (per mile)

Read the entire page →

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