  Minimizing social contact is an important tool to reduce the spread of
diseases, but harms people's well-being. This and other, more compelling
reasons, urge people to walk outside periodically. The present simulation
explores how organizing the traffic of pedestrians affects the number of
walking or running people passing by each other. By applying certain rules this
number can be significantly reduced, thus reducing the contribution of
person-to-person contagious to the basic reproductive number, R0. One example
is the traffic of pedestrians on sidewalks. Another is the use of walking or
running tracks in parks. It is demonstrated here that the number of people
crossing each other can be drastically reduced if one-way traffic is enforced
and runners are separated from walkers.
