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From page 20...
... 20 This chapter presents the results of a survey of transportation agencies concerning design vehicles that was conducted as part of the research. The questionnaire developed for the survey of transportation agencies consisted of 15 questions and is presented in Appendix A
From page 21...
... Survey of Transportation Agencies 21 The responses shown in Table 3 add up to more than 100% because agencies were free to make multiple responses. The most used of the current design vehicles were the P (passenger car)
From page 22...
... 22 Highway and Street Design Vehicles: An Update triple-trailer trucks. Some of these vehicles have offtracking equivalent to the WB-67 design vehicle (and, therefore, may not often be needed)
From page 23...
... Survey of Transportation Agencies 23 group of vehicles sold)
From page 24...
... 24 Highway and Street Design Vehicles: An Update • Five agencies stated that fire trucks or other emergency vehicles should be considered; one additional state asked whether an existing design vehicle could be used to represent fire trucks and ambulances. • Vehicles associated with hauling construction equipment.
From page 25...
... Survey of Transportation Agencies 25 – Trucks hauling large cranes – Trucks hauling wind turbines and wind-turbine blades – Grain-hauling trucks – Double-trailer combination with a maximum trailer combination length of 81.5 ft, plus several others – Specific vehicles that enter a particular site 3.2.7 Question 7 -- Are There Any of the Current AASHTO Green Book Design Vehicles That You Believe Are Not Needed and That Should Be Dropped from the AASHTO Green Book? Question 7 asked respondents if there are any of the current Green Book design vehicles that they believe are not needed and that should be dropped from the Green Book.
From page 26...
... 26 Highway and Street Design Vehicles: An Update Respondents that indicated "YES" were asked to describe the information to be added and the reason it is needed. The responses to this inquiry were as follows: • The increased dimensions of pickup trucks are a concern since they are the most representative type of vehicle on roadways currently.
From page 27...
... Survey of Transportation Agencies 27 Respondents that indicated "YES" were asked to refer the research team to a source for that guidance, such as a particular section of their agency's design manual. The responses to this inquiry were as follows: • The design vehicle for interstate and NHS routes is WB-67.
From page 28...
... 28 Highway and Street Design Vehicles: An Update that 83% of responding agencies use AutoTURN, 20% of responding agencies use Autodesk Vehicle Tracking, and 3% of responding agencies said that they use other software. The responses in Table 12 sum to more than 100.0% because some agencies use more than one software package.
From page 29...
... Survey of Transportation Agencies 29 • I believe the turning paths shown for each vehicle in the 2018 Green Book Figures 2-10 to 2-32 are good. Figures 9-23 to 9-30 from the 2011 Green Book are not needed because the intersections have varying widths and skew angles.
From page 30...
... 30 Highway and Street Design Vehicles: An Update including classification counts by vehicle type or number of axles and weigh-in-motion data. A subsequent review found that such databases do not generally classify vehicle types in sufficient detail to be useful in this research.

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