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Table 1 Overview of included physical and social environmental factors and their corresponding levels

From: Which physical and social environmental factors are most important for adolescents’ cycling for transport? An experimental study using manipulated photographs

Factor Level
Physical micro-environment
 Separation of cycle path No cycle path
Cycle path separated from traffic with lines, not separated from
walking path (advisory cycle path)
Cycle path separated from traffic with a curb, not separated from
walking path
Cycle path separated from traffic with a hedge, not separated
from walking path
Cycle path separated from traffic with a curb, cycle path different
colour from walking path
Cycle path separated from traffic with a hedge, cycle path different
colour from walking path
 Evenness of cycle path Very uneven
Moderately uneven
Even
 Speed limit 50 km/h
30 km/h
 Speed bump Absent
Present
 Traffic density 4 cars + truck
3 cars
1 car
 Amount of vegetation No trees
Two trees
Four trees
 Maintenance Poor upkeep (much graffiti and litter)
Moderate upkeep (a bit of graffiti and litter)
Good upkeep (no graffiti or litter)
Physical macro-environment
 Cycling distance Via this route it takes 15 min to reach your destination by bike
Via this route it takes 14 min to reach your destination by bike
Via this route it takes 13 min to reach your destination by bike
Via this route it takes 12 min to reach your destination by bike
Via this route it takes 11 min to reach your destination by bike
Via this route it takes 10 min to reach your destination by bike
Social environment
 Co-participation in cycling Via this route you will cycle alone
Via this route you can cycle along with a friend