1. NC DOT RESEARCH FY2012 Objectives, experiment design, simulation scenario, in-vehicle information design…

2. Objectives and Research Expectations Characterize driver use of guide and logo signs under normal and competing interest situations. – In terms of driver visual attention distribution and vehicle control Compare attentional loads associated with guide and logo signs. Hypotheses: – H1 – Greater visual distraction from road due to logo vs. guide for destination identification. – H2 – Distraction due to roadway signs inflated by use of in-vehicle information system for navigation (combined effect of sign and aid use). – H3 – In-vehicle information system will draw greater visual attention than use of signs. – H4 – Drivers will prioritize hazard negotiation (focus on roadway) over nav aid or sign use. – H5 – Driver vehicle control will be degraded by sign use. – H6 – Performance decrements due to sign use will be inflated by use of in-vehicle information system for nav. – H7 – Vehicle control performance will improve during hazard negotiation (vs. under distracted driving conditions).

3. Experiment Design Trial ID# of PanelsLocation of Construction ZoneNavigation Use ControlN/A Off 16EarlyOn 26EarlyOff 36LateOn 46LateOff 59EarlyOn 69EarlyOff 79LateOn 89LateOff

4. 2 miles 65 Lane 1 (L1) L2 Exit 11 (E11) POST INTERCHANGE Signage Pay attention to guide signs Subject to call out current destination name and distance Rhine 2 Peele 6 Morto 11 Rhine 2 Peele 6 Morto 11 65 mph Maintain normal speed Rhine Joran 1 mi Rhine Joran 1 mi 11 Exit 11 Think Loud Call out recite availability/exit No. e.g., I see there is a Hardee’s at Exit 11. (Experimenter records sign detection result.) Rhine Joran ½ mi Rhine Joran ½ mi 11 600 1700 800 1400 2800 FOOD LODGING GAS 800 1000 1400 Start Driving Start from the right (outside) lane: Ask subject to move to left (inside) lane whenever they see an overhead guide sign for an exit they are not taking. Ask subject to move to right (outside) lane after an exit merge in. Provide target destination: Nearby Science Museum in town of Peele Kitts using Exit 14. Need to take the least time to get to the museum Ask subject to call out sign/distance when they encounter signs and pass overpass. Food sign: Hardee’s Instruct subject to obey speed limit signs. 1400 Think Loud Call out name/distance e.g., I see my destination, Peele, which is in 6 miles. (Experimenter records sign detection result.) Exit 14 Exit 11 Jaspe  Jaspe  EXIT 11 30 Circle Rhine Joran  EXIT 11 30 Circle Rhine Joran 

5. 4.5 miles L1 L2 E14 65 45 mph Reduce speed before construction zone 65 mph Return to normal speed Exit 14 Overpass Peele Kitts 1 mi Peele Kitts 1 mi 14 Peele Kitts ½ mi Peele Kitts ½ mi 14 800 1000 800 2800 1860 3300 400 800 1500 2160 FOOD LODGING GAS POST INTER CHANGE 1440 800 Peele 4 Morto 8 Lenta 11 Peele 4 Morto 8 Lenta 11 End work zone 1100 1500 Start NAV Task ROUTE CHANGE Change target destination to Lenta (Exit 23) Remember destination name (Lenta) & exit number (23) Start NAV system use 45 Road Work 1 mi Right Lane Closed ½ mi 1000 1640 POST INTER CHANGE 1200 work zone Exit 20 Exit 14 Jaspe  Jaspe  EXIT 14 71 US Route Peele Kitts  EXIT 14 71 US Route Peele Kitts 

6. E20 Morto 4 Lenta 7 Keene 10 Morto 4 Lenta 7 Keene 10 Overpass 65 Exit 20 POST INTERCHANGE 4.5 miles Morto Maste 1 mi Morto Maste 1 mi 20 Morto Maste ½ mi Morto Maste ½ mi 20 800 2800 800 700 12001240 1960 FOOD LODGING GAS 1000 1860 600 12040 Change lane to a target dest. ( Exit 23 ) Remember exit name & Number Exit 23 Exit 20 Jaspe  Jaspe  EXIT 20 67 Circle Morto Maste  EXIT 20 67 Circle Morto Maste 

7. E23 Stop Driving Change lane for target dest. ( Exit 23 ) Remember exit name & number Lenta 2 Keene 6 Jaspe 13 Lenta 2 Keene 6 Jaspe 13 Overpass 65 Exit 23 POST INTERCHANGE 2.5 miles Lenta Notch 1 mi Lenta Notch 1 mi 23 Lenta Notch ½ mi Lenta Notch ½ mi 23 1960 1000 1440 700 1000 800 2800 FOOD LODGING GAS 800 1400 960 Exit 26 Exit 23 Jaspe  Jaspe  EXIT 23 22 Circle Lenta Notch  EXIT 23 22 Circle Lenta Notch 

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