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<br /> 19 <br />Table 6. Illumination of urban and suburban route sections. <br /> Accidents! <br /> MVM Night- Illumination <br /> Day <br />Route Day Night Ratio HFe Uniformity <br />4 Lanes <br />1-85, DeKalb County 2.29 2.63 US:! 0 <br />1-85, Atlanta 8.32 7A9 0.90:1 0.3 16.0;1 <br />1-75, Atlanta 4.82 3.75 0,82:1 0.3 16.0:1 <br />N. C. sec. 1, Dallas 2.98 3.96 1.31:1 1.1 3.2:1 <br />N. C. sec. 2, Dallas 5.20 .3.B8 0.73:1 0.5 3.6:1 <br />TIl-394 sec. 8-9, Chicago - 2.80:1 0 <br />6 Lanes <br />1-17, Phoenix 1.68 2.69 1.63:1 0.' 15.0:1 , <br />N. C. sec. 3, Dallas 5.90 4.80 0.81:1 0.3 7.5:1 'j' <br />1-75-85, Atlanta 9.24 9.98 1.08:1 0.4 4.0:1 <br />1-20 sec. 7, Atlanta 2.55 3.73 1.46:1 ,1.0 20.0:1 <br />1-294 sec. 2,6, Chicago 0.59 1.06 1.80:1 co <br />I-55 sec. 1-4, Chicago - - 1.90:1 1.0 3.7:1 <br />I-55 sec. -0, 7-9, Chicago - - 2.40:1 1.0 2.5:1 <br />I-5Ssec.5-6, Chicago - - 1.70:1 1.0 - . <br />1-94 sec. 1-3, Chicago - . 2.60:1 0.8 2.7:1 <br />1-94 sec. 0,4, Chicago l.06' 3.19 3.00:1 0 <br />1-94 sec. 0,4, Chicago' 1.18 1.59 1.30:1 1.5 4.5:1 <br />1~94 sec. 5~7, Chicago 0.93 2.62 2.90:1 0 <br />1~94 sec. 5-7, Chicago' 1.22 2.45 2.00:1 1.3 4.0:1 <br />B and 10 Lanes <br />I~20 sec. 4, Dallas 1.61 1.65 1.01:1 0.8 3.5:1 <br />1-35 sec. 7, Dallas 2.43 2.83 1.15:1 0.9 5.1:1 <br />401 Toronto~ 2.54 3.88 1.53:1 0.6 1.8:1 <br /> <br /> <br />'hl$ufficiem traffic count$ to enabli$h MVM rate. Ratio calculated from night percenta!lll. <br />trrwo $llCtioo$ with differing uniformitie::, combined. <br />oAfterllghting. <br />dNotu'ledinttatistiCilltests. <br /> <br />Table 7. Relation between illumination <br />and night-day accident ratio. <br /> <br />Figure 3. Accident ratios and average <br />illumination. <br /> <br />Night-Day <br />Accident Ratio <br /> <br />3.0 <br /> <br /> Number <br />Illumination of Injury~ <br />(HFC) Samples All Fatal <br />Lighted <br />0.3 to 0.6 7 1.07 1.40 <br />0.8 to 1.1 8 1.69 1.93 <br />1.3 to 1.5 2 1.65 1.85 <br />Avg 17 1.43 1.69 <br />Unlighted 5 2.37 3.53 <br /> <br />:J <br />~ <br />0: <br /> <br /> <br />h <br />~~ <br />1J~ <br />o <br />~ <br /> <br />o <br /> <br />0.5 <br /> <br />1.0 <br /> <br />1.5 <br /> <br />HFC <br />MEASURED AVERAGE <br /> <br />I <br />I <br /> <br />... <br />