I am looking for a way to calibrate Synchro/SimTraffic to better reflect heavy ped activity throughout the ped phase. By default, Synchro/SimTraffic appears to group the peds into a single platoon that crosses at the beginning of the ped phase. However, I am trying to simulate peds that cross throughout the ped phase. Thanks for the help.

have you tried with putting a lot of ped calls.

not just calls (in phasing) but ped volumes as well