Reoccurring Themes: Time, Cargo, Accessibility.
Two birds one stone
Timing is unpredictable as it depends heavily on time of day, traffic, location, driver's familiarity of streets, navigation, and GPS precision. Handicap accessibility depends on the driver's knowledge and vehicle make, city and curb zoning — the scope would be out of hand. Cargo space is something that is both manageable and predictable. Since Lyft depends on both drivers and riders the decision was straightforward. Both users may have their own personal belongings and attending to both driver's and rider's wants and needs would generate a greater probability of successful outcomes. Drivers have specific needs or preferences. Riders also have specific needs or preferences. So why not address both users at the same time?