Delays where?  The gates? Uh, automate the gates and require pre-purchased electronic passes.  Heck, have them available through mini-marts.  

In Taiwan, they have a thing called an "Easy Card".  You can use it for any public transportation, including their high speed rail system.  You can also use it at parks, museums, the zoo...pretty much any fee-charging public system.  And, you can purchase and load it at kiosks all over the place.  Their 7-11s, which are seemingly everywhere, you can pay bills and purchase tickets.  They're open 24/7, and don't require special government staffing.

Our approaches are so antiquated.  I buy registration for my boat every year.  If I have an issue, I have to work around their inconvenient hours to talk to someone and clear this up.  Slowly they've been offering more options through their website, but this could've been done years ago.  They're only one example of the public having to stop and wait for the government.