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<br />I <br />'. <br /> <br />Figure 2. Seasonal effect of ambient illumination. <br /> <br />15 <br /> <br /><fl <br />W <br />-1 <br />o <br />Z <br /><(10 <br />~ f- <br />o w <br />2 ~ <br />-1 ::l <br />:::(s<fl <br />I-" <br />Z <br />2 <br />0:: <br />00 <br />I <br /> <br />t- ::s:: <br />,~ 0:: <br />~,:e C!S <br />:;Q'~ <br />r' '3. 0 <br />, w <br />, ~ <br />,::l <br />,<fl <br />(f) <br />\ <(4.9 <br />.v; <br />3.3 ~~. ~ <br />" ).. <br />:1" .1.5 <br />'; <br /> <br />o 10 <br />TIME IN <br />AFTER <br /> <br />20 30 <br />MINUTES . <br />SUNSET <br /> <br />f- <br />I <br />19 <br />-1 <br />3: <br />f- <br />-1 <br />> <br />U <br /> <br />Table 2. lamp output as function of service. <br /> Percentage of Standard Lamp <br />Months in Number <br />Service Tested Low High Average <br />Under 24 15 54 " 79 <br />24 to 35 70 " 94 75 <br />36 to 47 83 40 94 76 <br />48to 59 171 30 94 70 <br />60 to 71 210 16 " 66 <br />72 to 83 I26 20 90 65 <br />84 to 95 113 18 84 53 <br />Over 95 24 30 74 50 <br />Toto! 804 32 89 67 <br />Variation from avg -52 +33 <br /> <br />I <br /> <br />I <br /> <br /> <br /> <br />Table 3. Results of before-aod-after lighting study. <br /> Belore -After <br /> Injury-Fatal Injury-Fatal <br /> All Accidents Accidents All Accidents Accidents <br />Freeway Num- Per- Per Num- Per- Num- Per- Per Num- Per- <br />Location Time her cent MVM he' cent her cent MVM her cent <br />132nd to H6th Day 40 47 1.06 15 39 29. 6B 1.18 17 83 <br /> Night " 53 3.19 23 61 ..!! 32 1.59 10 37 <br /> Total 86 100 1.59 38 100 43 100 1.29 27 100 <br />146th to 167th Day 105 51 0.93 30 37 79 60 1.22 30 60 <br /> Night 105 49 2.72 52 83 53 40 2.45 "!' 40 ,", <br /> Total 210 100 1.37 B2 100 132 100 1.53 50 100 <br /> <br />