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57 Open-Road Study Details This appendix contains details of the open-road study that supplement the material in Chapter 4. Table C-1 identifies the number of participants recruited from each location and the average ages of the participants. The sections that follow identify the specific routes used for data collection with the participants on the open road and the instructions given to the participants while driving the selected route. Routes The routes selected for each of the sites are shown in Google Maps images in Figure C-1 through Figure C-3. Instructions to Participants In each of the three locations, the researchers used a written script to instruct the participants where to drive and which signs to search for. An example of the script from Orlando, Florida, follows. Overall, the researcher provided turn-by- turn directions and asked the participants to call out each instance they saw a sign with the corresponding street and identify when they were confident in their response. The par- ticipants were asked to obey all traffic laws. To maintain some uniformity in the study, and because luminance data were recorded from one lane position, the researcher instructed the participant on which lane to drive in when multiple lanes were present. Instructions to be read before entering the vehicle: You will be driving our vehicle on a pre-determined route near this location. The vehicle is specially equipped to record and measure various driving characteristics, but drives just like a normal vehicle. A researcher will be in the car with you at all times and will direct you when, where, and how fast you will need to drive. You are to obey all traffic laws at all times and you must agree to wear a safety belt at all times. As you travel you will encounter several overhead signs. Clearly tell the researcher verbally what the sign says when you can read the words on the sign. In some cases, the researcher may give you a word and ask you to let the researcher know when you have clearly identified that particular sign and where it was located. Some signs may be repeated, so please let the researcher know when you can read each sign, and every time the sign reappears. Also note the location of the signs may be different. They may be overhead signs or signs on the side of the road to your left or to your right. In addition, please provide any comments about what you see that makes a sign easier or harder to find or read. At the end of the study the researcher will ask you a few follow-up questions. While we want you to focus on your driving tasks, your most important job is to drive safely, always paying attention to the road ahead and keeping the vehicle under control. Do you have any questions? If no, we will begin. Instructions to be read inside the vehicle (target signs are in Bold): ⢠Take the access road onto I-4 West, and merge into the next left lane when it is safe to do so. When the Lee Rd exit passes, please merge back into the upcoming right lane when it is safe to do so. ⢠Let me know when you can clearly identify any sign men- tioning Fairbanks Ave. There may be more than one. ⢠Take the Fairbanks Ave exit and make a left hand turn at the light. Please stay in the right left-turning lane on Fairbanks. Let me know when you can read the sign Formosa Ave. ⢠Now that you have identified Formosa Ave, let me know when you can read the sign for Orlando Ave. ⢠Now that you have identified Orlando Ave, let me know when you can read Denning Dr. ⢠Now that you have identified Denning Dr, let me know when you can read Pennsylvania Dr. ⢠Now that you have identified Pennsylvania Dr, let me know when you can read Park Ave. A P P E N D I X C
58 Location Younger (Avg = 23.9 yr) Older (Avg = 68.1 yr) Total Bryan/College Station, TX 7 (23.8 yr) 16 (71.9 yr) 23 San Antonio, TX 9 (23.4 yr) 16 (68.8 yr) 25 Orlando, FL 8 (24.6 yr) 16 (64.9 yr) 24 Table C-1. Number of participants and their average ages. Figure C-1. Bryan/College Station, Texas, route (map data: Google).
59 Figure C-2. San Antonio, Texas, route (map data: Google).
60 Figure C-3. Orlando, Florida, route (map data: Google).
61 ⢠Now that you have identified Park Ave, let me know when you can read any sign related to Henkel Cr. There may be more than one. ⢠Now that you have passed Henkel Cr, let me know when you can read Phelps St. ⢠Now that you have identified Phelps St, let me know when you can read Balfour St. ⢠At the light please make a right hand turn and stay in the right hand lane. Let me know when you can read any signs related to Scarlet Rd. There may be more than one. ⢠Now that you have identified Scarlet Rd, please let me know when you can read any signs related to Hanging Moss Rd. There may be more than one sign. ⢠Let me know when you can read any signs related to Old Cheney Hwy. ⢠Now that you have identified Old Cheney Hwy, please let me know when you can read any signs related to Oleander Dr. ⢠Now that you have identified Oleander Dr, please let me know when you can read any signs related to Yew Dr. ⢠At the next signal please make a right hand turn. Please let me know when you can read Andes Ave. At Conway/FL 15 please make a left hand turn, and proceed in the right hand lane when it is safe to do so. ⢠Please let me know when you can read the sign Kasper Dr with a K. ⢠Now that you have identified Kasper, please let me know when you can read Curry Ford Rd. ⢠Now that you have identified Curry Ford Rd, please let me know when you can read the sign Michigan St. ⢠Now that you have identified Michigan St, please let me know when you can read Anderson Rd. At the next signal make a right hand turn. ⢠Please let me know when you can read Pershing Ave. At the next stop sign make a left hand turn. ⢠Please let me know when you can read the sign Crystal Lake Dr. At the next stop sign make a left hand turn. ⢠Please let me know when you can read the sign Fern Creek Ave. ⢠At the next signal make a right hand turn and turn into the left hand lane. At that light make a left hand turn and stay in the right hand lane. Please let me know when you can read the sign Bradley Ave. ⢠Now that you have identified Bradley, let me know when you can read Raymar Dr. At the next signal make a right hand turn. ⢠Please let me know when you can read the sign I-4 East. Stay in the right hand lane and follow the road to merge onto the interstate. Please merge one lane left when it is safe to do so. ⢠Please let me know when you can read any signs related to South St. There may be multiple signs. ⢠Now that you have identified South St, please let me know when you can read any signs related to Amelia St. There may be more than one. ⢠Please let me know when you can read any signs related to Fairbanks Ave. There may be multiple signs. Now that you have identified Fairbanks Ave, the study is now over. When it is safe to do so, please merge into the right lane and take Exit 90B.
