squala,

IMO - the UVVRP scheme should be on selected roads and/or selected cities.

Take for example Makati - even without the 10 to 3 window the place is still jampacked with motorists (more often than not with only one passenger).

For QC, IMO it should only be limited to EDSA, Quezon Blvd / Espana, E. Rodriguez, C5, A. Bonifacio, C3 and other major roads. There are a lot of back roads in QC that are unused.

Caloocan, Manila, Mandaluyong & Pasay should lift the UVVRP since traffic build up there is limited to only a few major intersections.