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C-11 20. What threshold would you place on the brake stroke indicator to warn of a problem with the sys- tem? (select one for each type of actuator) 21. If given one of the three options described below, which would you deem more helpful in improv- ing the overall screening, inspection process, and safety of commercial vehicles: Option 1: Implement a screening procedure whereby vehicle, carrier, and driver identifier infor- mation could be downloaded wirelessly for each vehicle (well in advance of the weigh/inspection station) such that the information could be used to query databases containing driver history and credentialing data, past vehicle inspection history, and carrier safety rating data. Option 2: Introduce vehicle sensors that wirelessly transmit vehicle data, such as brake wear, tire pressure, total weight, etc., to the inspection station or the mobile crew. This data could be used to eliminate portions of the vehicle inspection, reduce the amount of time spent inspecting each truck, and assist in identifying which trucks to inspect. Option 3: Maintain the same procedures currently used, but double the number of trucks inspected through use of additional manpower and facilities. Please Select One: ___Option 1 ___Option 2 __Option 3 ADVANCED INSPECTION TECHNOLOGIES QUESTIONNAIRE RESULTS Results from the "Advanced Technologies" Questionnaire Question Percent 1) In your opinion, considering both vehicle and driver-related inspection items, which systems or parameters might lend themselves to being accurately monitored by on board sensors? (please write down all that apply) 2) If on-board technology could be implemented to monitor vehicle `health' (and/or electronically maintain driver history), and then wirelessly transmit the data to the inspection site, please rank order the following in terms of usefulness for selecting (screening) vehicles for further (manual) inspections (1 being the most important) a Tire Condition 15.0% Brake Condition 85.0% Vehicle Weight 15.0% Driver HOS 60.0% Driver Qualifications 15.0% Carrier Performance 5.0% Lighting system 5.0% Suspension 0.0% Exhaust System 0.0% Steering 0.0% Vehicle Inspection History 0.0% 3) If on board technology as described above were implemented for screening trucks, how would you prefer the information presented? (select one) a) A simple fault/no-fault for each system; (based on predetermined `rules' or 45.0% algorithms that define `fault' using system-specific performance or operational conditions). For example, a listing of those systems or items for which a `failure' was detected would be transmitted to the inspection site. b) A `snapshot' of recently recorded performance or operational values being 10.0% measured for each system (for example, data stored within the last 30 minutes of operation). The exact format and methodology for recording the `snapshot' data would again be developed as an industry standard much like standardized emissions data. a Only responses marked with a 1 or 2 have been counted.

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C-12 Results from the "Advanced Technologies" Questionnaire (continued) Question Percent c) Actual real-time feeds of parameters being measured by the on-board 45.0% diagnostic equipment; e.g., `live' feed of tire pressures, brake condition sensing, etc. d) Other 0.0% 4) If a fault/no fault light is used, when should the `fault' light be illuminated? (select one) a) Any time a system is out of spec, but not necessarily in violation 29.4% b) When there is a violation 41.2% c) When there is an OOS violation condition 5.9% d) When there is a safety critical violation 23.5% 5) When/how should this information be available to the inspections site? (select one) a) Well before the inspection station (perhaps two miles) so that a decision to inspect/not inspect can be made and a return signal sent within sufficient time to allow the truck to enter or bypass the station 25.0% b) Upon entering the exit ramp for inspection, but before scales/scalehouse (about the same point where WIM equipment is often positioned) 10.0% c) In front of scalehouse to allow visual inspection 5.0% d) Anytime/anywhere while vehicle is on the highway, upon request from any computer terminal (including mobile). 60.0% 6) What diagnostic or status information should be available to the driver? (select one) a) All diagnostic information should be available to the driver upon manual query of an interface screen or terminal. 55.0% b) Fault/No fault lights for each system (but not performance or operational values) 20.0% c) Graduated warning signals for various systems with an indication of when a `violation-level' situation has been reached 25.0% 7) If only a safety critical subset of information could be transmitted to the inspection site (due to limitations of the wireless communications media and the speed of the vehicle), please select the top three items that should be included in this "safety critical" message (select all that apply) Brake Condition 95.0% Tire Condition 40.0% Suspension 0.0% Driver HOS 100.0% CDL Information 35.0% Vehicle Inspection History 30.0% Fuel System 0.0% Exhaust System 5.0% Lights 5.0% Frame 0.0% Other (please specify) 0.0% 8) If the on board sensors report all vehicle systems are functioning properly, what other conditions/information would be needed in order for the truck to be permitted to bypass the inspection station, even if it were randomly sample for inspection? (select one) a) None--Anytime all sensors report no fault, the truck may bypass station 5.0% b) Would still need/want U.S. DOT registration number to check carrier history 20.0% c) Would still need/want CDL information to check driver history 30.0% d) For trucks randomly sampled for inspection, no matter what information about the carrier, driver or truck was transmitted; the truck would still need to pass in front of inspectors at slow speed to allow for quick visual inspection 35.0% e) Other 10.0%

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C-13 Results from the "Advanced Technologies" Questionnaire (continued) Question Percent 9) What is your main concern with implementing an `automated' wireless type of safety diagnostic system? (select one) a) Electronic falsification of data 28.6% b) Accuracy of measured data 33.3% c) Operator resistance to implementation 4.8% d) Added operational and maintenance requirements 28.6% e) Other (please specify) 4.8% 10) Which portions of a level 1 inspection could be eliminated if on board diagnostics were implemented? (select all that apply) Driver HOS 19.0% Driver Qualifications 9.5% Tire condition 9.5% Brake Condition 14.3% Lights 14.3% Suspension 4.8% Frame 4.8% Cargo Securement 0.0% Exhaust System 19.0% Fuel System 19.0% None, visual inspection is always required 61.9% 11) If a driver knows the truck they are driving is underweight, but also knows one or more items would fail inspection based on the automated on-board diagnostic system, do you feel drivers would disable the system in order to `take their chances' with random selection? a) Yes, most drivers 23.8% b) Yes, but very few drivers 66.7% c) No, most drivers would be more concerned about disciplinary actions by their employer (or concerned about threat of severe fines by the State) if such a system were purposely tampered with. 4.8% d) Other (please comment) 4.8% 12) On the opposite side, if a `no fault' signal allows the truck to bypass the stations, how prevalent will `black boxes' that emit this signal become? (select one) a) It will be a significant problem 22.7% b) Minor problem, stiff penalties would discourage the use of such devices 22.7% c) Minor problem, data encryption is advanced enough to prevent it 0.0% d) Cannot predict 54.5% 13) Considering possible falsified signals or privacy concerns, what system would be most appropriate to use for communications between vehicle and inspector? (select one) a) Encrypted, off the shelf WiFi 23.5% b) Private cellular communications 5.9% c) Private satellite communications 5.9% d) Other proprietary system not available to the public 64.7% 14) Regarding driver HOS violations, what would be sufficient to transmit to the inspection station? (select one) a) a simple `in-violation' versus `no-violation' signal. 50.0% b) transmit coded information that shows if an operator is approaching a violation threshold 10.0% c) Show actual HOS for each rule (10/15, 70 hr, etc.) 15.0% d) Must show complete logbook regardless of status of violation 25.0%

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C-14 Results from the "Advanced Technologies" Questionnaire (continued) Question Percent 15) Considering tire condition monitoring, what information should be transmitted to inspectors to determine the condition of the tire? (select one) a) Pressure only for all tires 10.0% b) Pressure and temperature for all tires 30.0% c) Fault/no fault flag only (green/red/amber light) 40.0% d) Pressure or temperature, only for the tires flagged as faulty 20.0% 16) Regarding tire pressures, what is the threshold for which you would like to see the tire pressure flagged as a problem? (select one) a) 30 psi 33.3% b) 60 psi 6.7% c) 70 psi 46.7% d) 80 psi 6.7% e) 90 psi 6.7% 17) What should the threshold be if two or more tires are under inflated? (select one) a) 30 psi 20.0% b) 60 psi 13.3% c) 70 psi 40.0% d) 80 psi 13.3% e) 90 psi 6.7% f) Other (please comment) 6.7% 18) Considering brake condition monitoring, rank the following items in importance to determine the overall condition of the brakes (1 being most important)b Air Leaks 47.6% Brake Stroke 42.9% Thickness of lining 4.8% ABS functionality 4.8% 19) Regarding the condition of the brakes, please select what single piece of information should be transmitted wirelessly to the inspector: ABS Status 5.0% Brake stroke in or out of spec 30.0% Brake lining thickness 0.0% Air leak rate 15.0% Overall fault/no fault 50.0% 20) What threshold would you place on the brake stroke indicator to warn of a problem with the system? (For `short' normal stroke actuators) a) 2 inches or greater 80.0% b) 21/8 inches or greater 5.0% c) 21/4 inches or greater 15.0% d) 23/8 inches or greater 0.0% 21) If given one of the three options described below, which would you deem more helpful in improving the overall screening, inspection process, and safety of commercial vehicles: Option 1: Implement a screening procedure whereby vehicle, carrier, and driver identifier information could be downloaded wirelessly for each vehicle (well in advance of the weigh/inspection station) such that the information could be used to query databases containing driver history and credentialing data, past vehicle inspection history, and carrier safety rating data. 45.0% b Only responses marked with a 1 have been counted.

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C-15 Results from the "Advanced Technologies" Questionnaire (continued) Question Percent Option 2: Introduce vehicle sensors that wirelessly transmit vehicle data, such as brake wear, tire pressure, total weight, etc., to the inspection station or the mobile crew. This data could be used to eliminate portions of the vehicle inspection, reduce the amount of time spent inspecting each truck, and assist in identifying which truck to inspect. 40.0% Option 3: Maintain the same procedures currently used, but double the number of trucks inspected through use of additional manpower and facilities. 15.0%