ATF	Away-from-traffic routes
ATN	Light attenuation value
BC	Black carbon
C	Concentration
CB	Conventional bicycles
CPC	Condensation particle counter
CTF	Close-to-traffic routes
ΔATN	Incremental light attenuation
EAB	Electrically-assisted bicycles
eBC	Equivalent black carbon
HR	Heart rate
LDSA	Lung-deposited surface area
MAC	Mass absorption cross-section
ONA	Optimized noise averaging
PM	Particulate matter
SMPS	Scanning mobility particle sizer
TRAP	Traffic-related air pollutant
UFP	Ultrafine particle
VE	Breathing rate or minute ventilation