Originally Posted by graraps
I was thinking that the boarding process would be more efficient if small jets could connect with a jetway on either side or large ones could use two at the same time... How come nobody's thought of that before me?
Take a look at the promotional material from the 1960s for the Boeing 747 and 2707 - they showed
four boarding jetways in use - Doors 1L and 1R and Doors 2L and 2R (2707) / Doors 3L and 3R (747).
As noted, some jetways have dual portals to allow 1L and 2L to board simultaneously on widebodies. And you will probably see dual portal / dual level jetways at airports like DXB, LHR, LAX, and SFO which will see heavy A380 traffic.