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Pages 60-98

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From page 60...
... 60 C H A P T E R   4 Introduction This chapter documents the uses of and practices for various technologies for inspection of new and existing highway infrastructure assets, as reported by eight state DOTs that demonstrated experience with the technologies. Data collected from the literature review and the survey questionnaire were used to identify state DOTs for further study using the following criteria: • The state's experience with the use of various technologies for inspection of highway infrastructure during construction and maintenance of assets, • The state's comprehensiveness and the availability of documents and data, and • The agency staff's willingness to participate.
From page 61...
... Case Examples 61   asset management. Currently, FDOT uses all four technology areas studied in this synthesis for construction inspection and asset management: (1)
From page 62...
... 62 Highway Infrastructure Inspection Practices for the Digital Age pandemic accelerated its implementation and use. A few projects had been piloted with e-ticketing prior to the pandemic, but because of pandemic restrictions, FDOT had to find ways to reduce the physical presence of on-site staff and eliminate the need to physically collect tickets, which was not allowed on jobsites during the pandemic.
From page 63...
... Case Examples 63   Mobile Devices and Software Applications Application for Highway Inspection During Construction For construction inspection, FDOT has implemented the use of 3D engineered models, AMG, tablets and smartphones, and handheld rover devices. FDOT is currently piloting projects in which the 3D model is developed by FDOT and provided to the contractor for AMG purposes.
From page 64...
... 64 Highway Infrastructure Inspection Practices for the Digital Age assets. Future enhancements within the e-maintenance system will include inventorying rest areas and weigh-in-motion stations.
From page 65...
... Case Examples 65   led FDOT toward a statewide network that broadcasts correction information for those devices instead of communicating with the base station. Overcoming incompatibilities has been a challenge, but FDOT has found different ways to address these issues and also requires specific technologies in the contracts so consultant inspectors will provide equipment that is compatible with the systems in place.
From page 66...
... 66 Highway Infrastructure Inspection Practices for the Digital Age been effective. IDOT accounts for costs in procuring and maintaining the new technologies when considering the value attained.
From page 67...
... Case Examples 67   currently procuring and working toward a significant system transition to the Deighton's Total Infrastructure Management System (dTIMS) infrastructure asset management software system.
From page 68...
... 68 Highway Infrastructure Inspection Practices for the Digital Age Mobile Devices and Software Applications Application for Highway Inspection During Construction For construction inspection, IDOT has been working with 3D models for some time, but it is not providing these models as the record contract document. The developed 2D or 3D model is communicated between the IDOT design division and construction division according to their computer-assisted drafting manual so it can be used with the rovers and total stations for checking grade or other project features.
From page 69...
... Case Examples 69   Application for Highway Infrastructure Inspection During Maintenance of Assets For asset management, nondestructive testing methods are also used, but to a lesser extent than during construction. A falling weight deflectometer has been used by IDOT's Bureau of Research on occasion for pavement evaluation.
From page 70...
... 70 Highway Infrastructure Inspection Practices for the Digital Age In the area of GIS use, federal protocols and the need to track various performance metrics provided the impetus for some of the Iowa DOT's inventory and inspection modules, but internal requests from field staff members led to initial module development. In 2010, a district maintenance manager's request for a paperless inventory and inspection system for culverts that allowed for mobile data collection started the Iowa DOT on its path of developing GIS modules.
From page 71...
... Case Examples 71   collected using UASs. By gaining the ability to make measurements and do inspections with the data, the Iowa DOT will be able to use these data for more than simply visuals, such as for erosion control.
From page 72...
... 72 Highway Infrastructure Inspection Practices for the Digital Age DOT uses barcodes and mobile applications as readers for a few of its approaches to data collection and tracking. An example of barcode use in construction is the GIS tracking and logging of asphalt cores and samples.
From page 73...
... Case Examples 73   Application for Highway Infrastructure Inspection During Maintenance of Assets For asset management, the majority of the mobile devices used for inspection of infrastructure assets are iPads and iPhones, with many of the applications used being developed in-house. These applications are focused on the asset's auxiliary to the Iowa DOT's official asset management plan, which focuses solely on roadway and structure assets and their condition.
From page 74...
... 74 Highway Infrastructure Inspection Practices for the Digital Age steel reinforcing and determining the extent of concrete deterioration. The Iowa DOT has also used magnetic imaging tomography scanners for verifying reinforcement placement in concrete and has started to use them to confirm asphalt and concrete pavement depths.
From page 75...
... Case Examples 75   does not lead to the purchase and application of the correct technology for a pilot, the opportunity may be lost. Minnesota Department of Transportation The Minnesota Department of Transportation (MnDOT)
From page 76...
... 76 Highway Infrastructure Inspection Practices for the Digital Age Geospatial Technologies Application for Highway Inspection During Construction MnDOT currently uses geospatial technologies for construction inspection (including GPS and handheld RTK devices for measuring quantities and assisting with developing as-builts) , UASs for bridge inspections, RTSs for inspections and verification, photogrammetry for measuring quantities and progress, and e-ticketing for digitally tracking materials.
From page 77...
... Case Examples 77   perception of some personnel that the technologies are too hard to figure out, that traditional means work just fine, and that there is no time to learn an innovative technology tool. Yet, as MnDOT has realized, overcoming these challenges with staff members has pushed them to be more digital with their projects and provides better data for construction and asset management.
From page 78...
... 78 Highway Infrastructure Inspection Practices for the Digital Age different departments and offices use different software and mobile devices. Externally, contractors may use different software and mobile devices as well.
From page 79...
... Case Examples 79   steel misalignment causes joints to crack and increases the maintenance needs of that particular asset. MITs are used as a specification to be used by contractors on specific MnDOT construction projects.
From page 80...
... 80 Highway Infrastructure Inspection Practices for the Digital Age New York State Department of Transportation The New York State Department of Transportation (NYSDOT) uses a variety of technologies for highway inspection during construction and asset management.
From page 81...
... Case Examples 81   For construction inspections, NYSDOT uses RTSs and digital levels to check specifications on a project (see Figure 4.2)
From page 82...
... 82 Highway Infrastructure Inspection Practices for the Digital Age Remote Sensing and Monitoring Technologies Application for Highway Inspection During Construction For construction inspection, NYSDOT uses LiDAR, RFID, IC, remote sensors, infrared sensors, and remote cameras. NYSDOT noted that inspectors use LiDAR for wall monitoring, roadway deviations, emergency situations, bridge clearances, and getting point clouds from construction to asset management.
From page 83...
... Case Examples 83   NYSDOT highways and roadways throughout the state. The consultant uses artificial intelligence on the collected data from the cameras and LiDAR to provide NYSDOT with linear feet of cracking across five different zones.
From page 84...
... 84 Highway Infrastructure Inspection Practices for the Digital Age Mobile Devices and Software Applications Application for Highway Inspection During Construction Mobile devices and software applications in use for construction inspections include 3D engineered models, AMG-equivalent inspection equipment, tablets and smartphones, handheld RTK devices, VR/AR, and various mobile apps and software programs to collect, view, and analyze the data collected with the mobile digital devices. NYSDOT noted that 3D models are used along with a BIM specification on large design-build projects.
From page 85...
... Case Examples 85   Dynamic test loading for piles is used by NYSDOT for inspections. The geotechnical group at NYSDOT is in charge of conducting cross-hole sonic logging on all drilled-shaft construction work and performing inspections using the falling weight deflectometer.
From page 86...
... 86 Highway Infrastructure Inspection Practices for the Digital Age Use of Technologies for Construction Inspection and Asset Management In the past 10 years, ODOT has developed internal divisions that manage the exploration and implementation of technologies for construction and asset management. In 2010, a 25-year automation plan was developed at ODOT by visionary leaders to map out future technology use for various processes at ODOT, including infrastructure inspections during construction and asset management.
From page 87...
... Case Examples 87   for inspection. Furthermore, ODOT uses RTSs when GNSS is not working or has only limited connectivity because of mountainous areas.
From page 88...
... 88 Highway Infrastructure Inspection Practices for the Digital Age Remote sensors, including accelerometers, maturity meters, and stress/strain gauges, are used in construction inspections, mainly on a trial basis, and are not used statewide. One example provided by ODOT is that it uses sensors with bridge projects that might be susceptible to slides.
From page 89...
... Case Examples 89   efficiency in clearing the hazardous trees before they cause additional damage to ODOT roadways in the wildfire-affected areas. A challenge that ODOT is experiencing with the use of remote sensing technologies is in the use of a combination of technologies to perform tasks.
From page 90...
... 90 Highway Infrastructure Inspection Practices for the Digital Age testing, and infrared thermography are all used by ODOT for construction inspection purposes. GPR tends to be used for project development to check for burial grounds and archaeological sites as well as to verify pavement depths and bridge work to check reinforcing steel placement during construction.
From page 91...
... Case Examples 91   remote sensing, and nondestructive evaluation methods. The following sections discuss the typical technologies used by PennDOT for highway infrastructure inspection during construction inspections and maintenance of assets.
From page 92...
... 92 Highway Infrastructure Inspection Practices for the Digital Age and light pole assets. The location of guiderails has been of particular importance as PennDOT was informed that some of its guiderails across the state were not manufactured in accordance with specifications.
From page 93...
... Case Examples 93   required an inspector to be on site during the entire paving test. During the pandemic, this was not allowed.
From page 94...
... 94 Highway Infrastructure Inspection Practices for the Digital Age piles. Similarly, ultrasonic testing, thermal integrity testing, and cross-hole sonic logging are used for inspection of drilled shafts.
From page 95...
... Case Examples 95   Use of Technologies for Construction Inspection and Asset Management At SDDOT, the initial use of any technology requires an evaluation process to determine its value along with the associated costs of the technology. Typically, a work group is formed with in-house users and sometimes contractors to investigate the candidate technology.
From page 96...
... 96 Highway Infrastructure Inspection Practices for the Digital Age data management and accessibility and providing enough support for inspectors to use the mobile applications for asset inventory. Remote Sensing and Monitoring Technologies Application for Highway Inspection During Construction SDDOT's use of LiDAR/3D laser scanning and IC has been limited, and SDDOT has also used remote cameras for highway construction inspection.
From page 97...
... Case Examples 97   and SDDOT switched to tablets. The switch required SDDOT to convert to different applications from the customized software SDDOT had used on the handheld devices, which resulted in limited functionality in some areas of asset management.
From page 98...
... 98 Highway Infrastructure Inspection Practices for the Digital Age working groups typically include third-party contractors and consultants. In fact, SDDOT has gained several innovative ideas from the working groups that are currently being implemented.

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