(Portland, OR)  --  The City of Portland is working on permanent rules for an e-scooter program.  During a pilot program, officials say e-scooter riders traveled 415-thousand miles and rode an average distance of slightly more than a mile.  Riders were also found to be doing a better job at following the rules regarding e-scooter use.  The pilot program runs through the end of the year.  The Portland Bureau of Transportation is taking public comment on rules for a permanent program.