Table 1 - Description, Factor Levels, Coding System, and Basic Statistics of the Explanatory Variables

Table 1 - Description, Factor Levels, Coding System, and Basic Statistics of the Explanatory Variables

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Explanatory d variables Description Factor levels Coding system in GLIM Min Max Mean Median
MODEL 1              
QNMm Nonmotorcycle flow on major road (nmpd)   QNMm 14,527 50,529 31,389 32,354
QNMn Nonmotorcycle flow on minor road (nmpd)   QNMn 2,133 20,129 11,276 11,129
QMm Motorcycle flow on major road (mpd)   QMm 5,510 21,899 12,228 10,792
QMn Motorcycle flow on minor road (mpd)   QMn 1,752 4,771 3,183 3,142
QPED Pedestrian flow (pedestrians/hour)   QPED 0 235 36 19
SPEED Approach speed (km/hour)   SPEED 53.00 68.00 59.57 59.50
LWm Average lane width on major road (m)   LWm 3.30 4.00 3.58 3.60
LWn Average lane width on minor road (m)   LWn 3.40 4.00 3.69 3.60
LNm Number of lanes on major road (lanes/traffic direction)   LNm 2 5 2.6 2.0
LNn Number of lanes on minor road (lanes/traffic direction)   LNn 1 3 1.6 2.0
NL Number of legs 2 (1) 3-legged
(2) 4-legged
1 2 1.5 1.0
SHDW Average shoulder width on major and minor roads 3 (1) SHDW = 0.00 m
(2) 0.00 < SHDW ≤ 1.00 m
(3) SHDW > 1.00m
1 3 1.7 2.0
LU Land-use category 2 (1) Noncommercial area
(2) Commercial area
1 2 1.7 2.0
MODEL 2              
Qmajor Traffic flow on major road (vehicles/day)   Qmajor 20,043 72,428 43,617 42,258
Qmajor Traffic flow on minor road (vehicles/day)   Qminor 4,504 24,900 14,459 14,293
SHD Average shoulder width on major and minor roads (m)   SHD 0 1.3 0.5 0.9

Key: km = kilometers; m = meters; mpd = motorcycles per day; nmpd = nonmotorcycles per day.