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From page 54... ... Standard Definitions for Common Types of Pavement Cracking 47 C H A P T E R 6 Testing of the Proposed Cracking Definitions This chapter describes the effort and results involved in testing the applicability and effectiveness of the proposed cracking definitions for collecting, processing, and reporting cracking data in a systematic and rational approach. In the test, multiple data sets were collected on highways in Oklahoma to determine the feasibility of applying the proposed three levels of cracking definitions. Read the entire page →
From page 55... ... Standard Definitions for Common Types of Pavement Cracking 48 Table 11 Summary of Field Testing Sites Site ID Pavement Type Beginning GPS Coordinate Visual Inspection Longitude Latitude 1 Asphalt -97.08737 36.1183 With many wide cracks. 2 -97.08447 36.126 With many wide cracks. Read the entire page →
From page 56... ... Standard Definitions for Common Types of Pavement Cracking 49 defined based on the positions of lane markings, this feature is critical for Level 1 and Level 2 analysis. Examples of the software interface for lane marking detection is shown in Figure 19. Read the entire page →
From page 57... ... Standard Definitions for Common Types of Pavement Cracking 50 Wheel Path and Grid Generation Once the lane markings are determined, wheel path and grids are generated to summarize cracking data according to the proposed definitions. Figure 21(a) Read the entire page →
From page 58... ... Standard Definitions for Common Types of Pavement Cracking 51 determine the image area for cracking detection. The shown software capabilities in Figures 19 to 21 are used herein for illustration purposes only. Read the entire page →
From page 59... ... Standard Definitions for Common Types of Pavement Cracking 52 (a) Six asphalt sites. Read the entire page →
From page 60... ... Standard Definitions for Common Types of Pavement Cracking 53 Table 13 Statistical Summary of Level 2 Cracking Data Site ID Level 2 Cracking Data (%) Low Severity Medium Severity High Severity Mean SD CV Mean SD CV Mean SD CV 1 6.4 0.2 3.9 11.3 0.4 3.6 82.3 0.5 0.6 2 5.6 0.3 6.1 9.1 0.4 4.9 85.3 0.6 0.7 3 61.0 1.4 2.3 36.8 1.3 3.5 2.2 0.2 9.9 4 57.1 3.8 6.7 39.1 3.1 7.9 3.8 0.9 23.9 5 56.1 7.2 12.8 14.9 8.6 57.5 29.0 1.9 6.5 6 73.6 3.8 5.1 24.7 4.1 16.5 1.7 0.3 20.2 7 69.7 3.1 4.4 26.7 2.8 10.4 3.6 0.8 22.8 8 65.3 3.8 5.9 29.1 3.0 10.4 5.6 1.5 26.4 9 89.8 2.4 2.7 9.1 2.2 23.8 1.1 0.7 56.7 10 61.0 1.4 2.4 33.4 1.2 3.4 5.6 0.5 8.4 11 72.9 2.0 2.7 24.2 2.3 9.6 2.9 1.1 39.5 12 82.5 6.5 7.8 16.2 6.1 37.7 1.3 0.7 51.8 For asphalt pavements, sites 3 and 4 have largely low and medium severity level cracks, while sites 1 and 2 have predominantly high severity cracks. Read the entire page →
From page 61... ... Standard Definitions for Common Types of Pavement Cracking 54 (a) Low severity cracking percent. Read the entire page →
From page 62... ... Standard Definitions for Common Types of Pavement Cracking 55 (a) Low severity cracking percent. Read the entire page →
From page 63... ... Standard Definitions for Common Types of Pavement Cracking 56 In addition, cracking information in each zone can provide pavement engineers with a better understanding of the pavement conditions relevant to traffic loading. For instance, if the wheel paths (Zones 2 and 4) Read the entire page →
From page 64... ... Standard Definitions for Common Types of Pavement Cracking 57 (a) Level 2 cracking percentage at each zone (b) Read the entire page →
From page 65... ... Standard Definitions for Common Types of Pavement Cracking 58 Table 16 Statistical Summary of Level 1 Cracking Data for Asphalt Sites Site ID Statistical Result Longitudinal Crack (ft) Transverse Crack (ft) Read the entire page →
From page 66... ... Standard Definitions for Common Types of Pavement Cracking 59 traditional manual based cracking surveys for decades, further research is highly recommended to validate these potential applications using the proposed cracking data definitions. Table 17 Statistical Summary of Level 1 Cracking Data with Severity Levels for Asphalt Sites Site ID Statistical Results Longitudinal Crack (ft) Read the entire page →
From page 67... ... Standard Definitions for Common Types of Pavement Cracking 60 Similarly, further research is recommended to validate these potential applications of cracking data for JPCP pavements. Summary The data collection and analysis in this chapter address the feasibility of applying the proposed cracking definitions using state-of-the-art 3D laser imaging and Deep-Learning based solutions. Read the entire page →
From page 68... ... Standard Definitions for Common Types of Pavement Cracking 61 Table 18 Statistical Summary of Level 1 Cracking Data for JPCP Sites Site ID Statistical Results Longitudinal Crack (ft) Transverse Crack (ft) Read the entire page →

From page 54...

... Standard Definitions for Common Types of Pavement Cracking 47 C H A P T E R 6 Testing of the Proposed Cracking Definitions This chapter describes the effort and results involved in testing the applicability and effectiveness of the proposed cracking definitions for collecting, processing, and reporting cracking data in a systematic and rational approach. In the test, multiple data sets were collected on highways in Oklahoma to determine the feasibility of applying the proposed three levels of cracking definitions.