Falling Weight Deflectometer Usage (2008)

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45 ground Information, where the respondents’ contact infor- mation was collected; (2) FWD Equipment Types; (3) FWD Equipment Maintenance; (4) FWD Equipment Calibra- tion; (5) General FWD Testing Procedures; (6) FWD Field Testing—Flexible Pavements; (7) FWD Field Testing— Rigid Pavements; (8) FWD Computers; (9) Data Analysis; (10) Data Management and Storage; (11) Personnel Training; and (12) FWD Program Administration, which was split into two sections for the benefit of online responses. A summary of the individual states that replied and their responses is given in Appendix B. The survey questionnaire was prepared for this synthesis and reviewed initially by the panel members. Invitations to take the survey were sent to falling weight deflectometer (FWD) administrators in each of the 50 state highway agencies (SHAs) in the United States. Continuous communication with SHA representatives resulted in 45 of those 50 invitees responding, for a response rate of 90%. One response was submitted by mail. All other responses were submitted by means of an online form. The survey contained a total of 88 separate questions. The questions are grouped into 12 broad categories: (1) Back- appendix a surVeY quesTionnaire

46                                        

47                               

48                                         

49                                     

50                        

51                                          

52                                           

53                                                         

54                                                         

55           

56                                             

57                                                         

58                                                          

59           

60                                        

61                                          

62               

63                                           

64                      

65                                  

66                                                 

67          