Table 1 Variables description in Iranian Integrated Road Traffic Injury Registry System (2015–2016) – Crash database
From: Modeling road traffic fatalities in Iran’s six most populous provinces, 2015–2016
Original variable name | Original variable levels | Modified variable name | Modified variable levels |
|---|---|---|---|
Accident date, date format | NA | Crash season | spring, summer, fall, winter |
Crash day | weekend, weekday | ||
Crash seri, cont | NA | NA | NA |
Crash serial, cont | NA | NA | NA |
Crash type | property damage, injury, death | Crash severity | non-fatal, fatal |
Light status | day, night, twilight, dawn | Lightning status | Day, night, twilight/dawn |
Air status | clear, rainy, cloudy, snowy, foggy, stormy, dusty | Weather | clear/cloudy, foggy/stormy/dusty, rainy, snowy |
Scene status | scene without exchanged details, scene with exchanged details | NA | NA |
Distance from nearest police station (km), cont | NA | NA | NA |
Agent status | stayed at the scene, left the scene, had been transformed to a hospital, had died at the scene | NA | NA |
Zone type | smooth, rough, mountainous | NA | NA |
Intersection control | no control, traffic Police, traffic light, yield sign, stop sign, barbed gate, other | NA | NA |
Road lane line marking | broken line, no line, single solid line, double solid line | NA | NA |
Road material | sand-soil, asphalt | NA | NA |
Land use | residential, commercial, nonresidential, agricultural, industrial, recreational, pedagogical, other | NA | residential, nonresidential, multipurpose area |
Officer code, cont | NA | NA | NA |
Crash mechanism | vehicle to vehicle, vehicle to multiple vehicle, vehicle to pedestrian, vehicle to livestock, vehicle to motorcycle, vehicle to fixed object, rollover, fire, vehicle to rider, pedestrian fall, bicycle to pedestrian, motorcycle to motorcycle, motorcycle to bicycle, motorcycle to pedestrian, off-road, vehicle to bicycle, vehicle to stopped vehicle, passenger thrown, multiple crash | NA | single-vehicle crash: rollover/ fire/ vehicle to fixed object/ vehicle to livestock/ off-road/ vehicle to stopped vehicle/ passenger thrown/ multiple-vehicle crash: vehicle to vehicle/ vehicle to multiple vehicle/ multiple crash involving vulnerable road user crash: vehicle to pedestrian/ vehicle to motorcycle/ vehicle to rider/ pedestrian fall/ bicycle to pedestrian/ motorcycle to motorcycle/ motorcycle to bicycle/ motorcycle to pedestrian/ vehicle to bicycle |
Road view obstruction | no, moving vehicle, tree/ shrub, building/ Kiosk, stopped vehicle, vertical curve, slop, hill, sunlight, fog/ smoke, front vehicle beam, sandstorm, sign, blizzard, frozen glass | NA | no, yes |
Crash position | riding lane, refuge, roadside, off-road, road shoulder | Crash position in riding lane | no, yes |
Road surface | dry, wet, frosty, sand-oil, muddy, greasy & oily | Dry road surface | no, yes |
Road geometric design | straight, squad curve, horizontal curve, vertical curve | Curved geometric design | no, yes |
Vehicle factor | no, lightning system, brake system, lack of wiper, smooth tire, steering system, lack of tire chains at emergent, suspension system | NA | no, yes |
Human factor | no, hasty driving, ignoring the traffic regulations, fatigue and drowsiness, failure to detect yield, unfamiliar route, drunken driving, unstable load restraint, old age, willful misconduct, drug abuse, defected organ | NA | no, yes |
First cause | need for more driver training, lack of personal and social responsibility, failure of road officials in repairing road defects, failure of road construction companies to install signs, lack of timely snow removal by the Ministry of Roads | NA | more training, irresponsibility, more training & irresponsibility, failure of organs, multiple factors |
Prior cause | hasty driving, lack of attention to driving, lack of sufficient skills in driving, fatigue and drowsiness, lack of skill in diagnosing traffic situation, slippery or tarred road surface, technical defects of the vehicle, obstacles and bumps, drunken driving, lack of skills in diagnosing road conditions, lack of road position detection, catching the opportunity, sharp horizontal curve, heavy snowfall or rain, physical weakness, storms and dust, sharp slope, road position and taken speed mismatch, mental and nervous system defect, visual and auditory senses defect, skeleton defect | NA | hasty driving, lack of attention to driving, hasty driving & lack of attention to driving, lacked skill, other |
Direct cause | ignoring the traffic regulations, delay in sighting, over speeding, escaping the crash in a wrong way | NA | ignoring the traffic regulations, delay in sighting, over speeding, escaping the crash in a wrong way or multiple factor |
Collision type | front bumper to front bumper, front bumper to back bumper, front bumper to right side, front bumper to left side, left side to right side, front bumper to fixed object, back bumper to right side, back bumper to left side, left side to left side, right side to right side, right side to fixed object, left side to fixed object, back bumper to fixed object, other | NA | head-on collision, rear-end collisions, T-bone collision, side-swipe collision, fixed-object collision, other |
Province | Tehran-bozorg, Tehran East, Tehran West, Isfahan, Khorasan Razavi, Khouzestan, Fars, East Azerbaijan | NA | Tehran, Isfahan, Khorasan Razavi, Khouzestan, Fars, East Azerbaijan |
Crash longitude coordinate (degree), cont | NA | NA | NA |
Crash latitude coordinate (degree), cont | NA | NA | NA |
Crash commuting area | urban, suburban, rural road, exclusive urban area, exclusive suburban area | NA | NA |
Road typea | freeway, expressway, main road, main street, side street, side road, rural road, straight road, alley, square, intersection, main arterial street, boulevard, entrance ramp, side arterial street, bridge, one-sided, horizontal curve, other | NA | freeway, expressway, main road, side road, rural road, main street, side street, alley |
Road shoulder | unpaved, soil, asphalt | NA | NA |
Road shoulder width (m), cont | NA | NA | NA |
Road beginning, str | NA | NA | NA |
Road end, str | NA | NA | NA |
Road length(km), cont | NA | NA | NA |
Road width (m), cont | NA | NA | NA |
Road design | separated two-way road, unseparated two-way road, one-way road | NA | NA |
Road defect | no, defect of vertical traffic signs, narrow passage, defect of horizontal traffic signs, passage marking defect, passage lightning defect, lack of soil shoulder and parking, lack of safety guard next to the passage, bump obstacle, sharp arc, level difference between asphalt and shoulder, asphalt surface defects, road collapse, slippery road surface, non-standard latitudinal and longitudinal slopes, non-standard guard next to the passage | NA | no, pavement defects, signs defects, geometric defects, lightning defects |
Road permitted speed (Km/h), cont | NA | NA | < = 30, 30–50, 50–60, 60–80, 80–95, 95–110, 110–120 |
Road repairing status | no repairs, under repairing without adequate signs, under repairing with adequate signs | NA | no, yes |
Vehicle type | passenger car, motorcycle, pickup truck, lorry, taxi,, two trunk, mini-trunk, bus, minibus, bicycle, ambulance, tractor, constructional tools, agricultural tools, police car, semi-trailer, trailer, trail, lpg (Liquefied Petroleum Gas) tanker trailer, auto camping, fire truck | Vehicle type based on European Commission | L: tricycle/ bicycle/motorcycle, M_L: passenger < 9 P, M_H: passenger > 9 P, N_L: goods < = 6 T, N_H: goods > = 6 T, T: agricultural/ constructional tools |
Vehicle type based on previous studies | light, heavy, tricycle/ bicycle/motorcycle | ||
Vehicle system, cont | 1007 values indicating vehicle’s brand such as: BMW, Benz, Toyota, Hyundai, pride, peugeot, etc | NA | NA |
Vehicle system ID, cont | 2394 values indicating vehicle’s model such as: X4, C200, Corolla, Sonata, 141, 2008, etc | NA | NA |
Vehicle company, cont | 131 values indicating manufacturer company such as: BMW, Benz, Toyota, Hyundai, Saipa, Iran Khodro, etc | NA | NA |
Vehicle parent company, cont | 94 values indicating owner organization such as: Post office, Ministry of foreign affairs, bus service, etc | NA | NA |
Vehicle safety equipment | no, abs, airbag, abs & airbag | NA | NA |
Vehicle color | white, silver, graphite gray, black, blue, green, yellow, cream, red, orange, brown, dark blue, gray, purple, pink | NA | low risk, high risk |
Vehicle plaque number, str | NA | NA | NA |
Vehicle plaque serial, str | NA | NA | NA |
Vehicle year produced, cont | NA | Vehicle life | less than 5yrs, 5 to 9 yrs, 10 to 14 yrs, 15 and more than 15yrs |
Vehicle plaque description | 38 values indicating plaque type such as: personal regional, free zones, governmenta, etc | personal regional, other | |
Vehicle moving direction | N-S, E-W, W-E, S–N, S-W, N-E, W–N, E-S, N-W, S-E, E-N, W-S | NA | cardinal direction, ordinal direction |
Vehicle maneuver | moving ahead, turning left, stopping on the road, turning, turning right, moving backward, stopping outside of the road, sudden starting, sudden stopping, overtaking, spiral movement | NA | moving forward, turning, stopping on the road, moving backward, overtaking, other |
Remained effect | no, detached vehicle parts, asphalt damage, poured oil, other | NA | NA |
Driver first name, str | NA | NA | NA |
Driver last name, str | NA | NA | NA |
Driver national ID. cont | NA | NA | NA |
Driver fault status | at fault, not at fault | NA | NA |
Driver gender | male, female | NA | NA |
Driver education | illiterate, literacy, elementary, cycle, middle school, diploma, B.Sc., A.Sc., M.Sc., PhD, hozavi | Driver education based on ISCED | isced0, isced1, isced2, isced3, isced5, isced6 |
Driver education based on previous studies | illiterate, primary, nonacademic, academic | ||
Driver job | self-employed, employee, jobless, housewife, military man, laborer, student, university student, driver, soldier, other | NA | jobs with high economic status, jobs with middle economic status, jobs with low economic status |
Driver age (yrs), cont | NA | NA | child, adult, old |
Type of driving license | class A, class B, class C, B1, B1-new, B2, B1-Temporary, B2-temporary, military, special, foreign, international, motorcycle, tractor, not seen, no license | NA | class A, class B, class C, motorcycle, no license |
Driver license ID, cont | NA | NA | |
Driver injury type | not-injured, injured, dead | NA | NA |
Driver total reason | lack of attention to the front, failure to yield right-of-way, failure to maintain vehicle control, changing direction abruptly, moving backward in reverse gear, failure to longitudinal distance control, deviation to the left, driving in the wrong direction, making incorrect left turn, violation of safe speed, failure to latitudinal distance control, Sudden opening of the vehicle door, deviation to the left due to overtaking, running red light, passing the prohibited place, turning in the prohibited place, vehicle technical defect, over speeding, lack of skills in driving, persistent technical defects of the vehicle, deviation to the right, violation of load regulations, violation of item 4 of the road safety, towing incorrectly, pedestrian fault, other | NA | lack of attention to the front, failure to yield right-of-way, failure to maintain vehicle control, changing direction abruptly, moving backward in reverse gear, failure to longitudinal distance control, other |
Driver seat belt usage status | used, not used | NA | NA |
Driver reaction | no reaction, brake, deviation to the right, get out of the car | NA | NA |
Driver Judiciary cause | carelessness, unconscious, lack of driving skills, violation of the law | NA | carelessness, other |
Driver misconduct | failure to yield right-of-way, failure to yield right-of-way, over speeding, failure to distance control while overtaking, running red light, passing the prohibited place, illegal overtaking, turning left or right in the prohibited place, turning in the prohibited place, drunken driving, lack of safety equipment for the season, not turning on the lights from sunset to sunrise, not using glasses while driving, defective vehicle lighting system at night, demonstrative movement, spiral movement, crossing the sidewalk | NA | spiral movement, over speeding, other |
Passenger first name, str | NA | NA | NA |
Passenger last name, str | NA | NA | NA |
Passenger gender | male, female | NA | NA |
Passenger education | literate, literacy, elementary, cycle, middle school, diploma, B.Sc., A.Sc., M.Sc | Passenger education based on ISCED | isced0, isced1, isced2, isced3, isced5 |
Passenger education based on previous studies | illiterate, primary, non-academic, academic | ||
Passenger job | self-employed, employee, jobless, housewife, military man, laborer, student, university student, driver, soldier | NA | jobs with high economic status, jobs with middle economic status, jobs with low economic status |
Passenger age (yrs), cont | NA | NA | child, adult, old |
Passenger injury type | injured, dead | NA | NA |
Passenger seat belt usage status | used, not used | NA | NA |
Passenger injured organ | head and face, neck, hand and arm, chest and abdomen, legs, back, right leg, left leg, pelvis, right hand, left hand, shoulder, skull, forehead, right eye, eyes, left eye, other | Passenger injured organ based on ICD10 codes | S0-S1 (head), S4-S6 (upper limb), S2-S3 (trunk), S7-S9 (lower limb), other |
Passenger fault status | at fault, not at fault | NA | NA |
Passenger total reason | passenger fault, passenger total reason1, passenger total reason2 | NA | NA |
Pedestrian first name, str | NA | NA | NA |
Pedestrian last name, str | NA | NA | NA |
Pedestrian injury type | injured, dead | NA | NA |
Pedestrian clothes color | light, dark | NA | NA |
Pedestrian status | NA | NA | low-risk, moderate-risk, high-risk |
Pedestrian injured organ | head and face, neck, hand and arm, chest and abdomen, legs, back, right leg, left leg, pelvis, right hand, left hand, shoulder, skull, forehead, right eye, eyes, left eye, other | Pedestrian injured organ based on ICD10 codes | S0-S1 (head), S4-S6 (upper limb), S2-S3 (trunk), S7-S9 (lower limb), other |
Passage utilities | no, no need, zebra crossing, footbridge, underpass | NA | no, yes |
Passage place status | allowed, not allowed | NA | NA |
pedestrian gender | male, female | NA | NA |
Pedestrian national ID, cont | NA | NA | NA |
Pedestrian education | illiterate, literacy, elementary, cycle, middle school, diploma, A.Sc., hozavi, B.Sc., M.Sc., doctoral degree, PhD | Pedestrian education based on ISCED | isced0, isced1, isced2, isced3, isced5, isced6 |
Pedestrian education based on previous studies | illiterate, primary, non-academic, academic | ||
Pedestrian job | self-employed, employee, jobless, housewife, military man, laborer, student, university student, driver, soldier | NA | jobs with high economic status, jobs with middle economic status, jobs with low economic status |
Pedestrian age (yrs), cont | NA | NA | child, adult, old |
Pedestrian fault status | at fault, not at fault | NA | |
Pedestrian total reason | not using the designated crossings, sudden entrance to the road, not using the designated crossings on highways and main streets, crossing the freeways’ fence and trees and shrubs, running the red light | NA | unsafe crossings in urban areas, unsafe crossings in sub-urban area |
Pedestrian transfer type | ambulance, crossing vehicle | NA | NA |
Pedestrian judiciary cause | carelessness, negligence, non-compliance with government systems, lack of driving skills | NA | carelessness, other |