. >> reporter: spokesman robert liles says the first thing commuters will notice are the digital pylons it has touch screen information. so riders can walk up, choose their bus line, look at a map and gather up to daet information. >> riders will glide from the bay bridge over city streets on a cable bus ramp leading the to and from the terminal, cutting as much as five minutes from the commute. asc transit will switch from the center a few blocks away. there are ambassadors on site to inform riders about the change and answer questions, and maybeen ties you with details of a new terminal with its rooftop garden steps away. >> what's amazing about the bus duck, we are just one flight down from this 5.4 acre park. the park features all these various bio spheres, will ultimately have eateries. it's fully combined experience. >> combined experience and it is stunning. it's impressive. you can check it all out up close on saturday. that's when the transbay transit center will host a block party. bus service begins on sunday. find more on our website, abc7news.com. >>> another sunny, hazy da

with me i have robert liles to talk about that. what is going to happen when the bus gets here? >> we are going to have a ribbon break. we are going to break from the tradition of having someone stand out with a large scissors and cut the ribbon, instead the bus will break the ribbon. it will officially inaugurate all 27 bus lines that once serviced the trans bay terminal and will all now service here at the southport transit center. >> how do you feel? >> we are excited. this has been eight years in the making. there have been delays along the way, but all of that is nothing when you look at this amazing center . the is absolutely beautiful. anyone who takes a trip into here, we encourage everyone to park their cars today and jump on a trans bay line, it looks more like an airport terminal. it is modern inconvenient -- and convenient. it is now easy to navigate. when daybreak comes you can go one flight up to the park and it is amazing. >> anybody who lives and works in san francisco knows how bad congestion can get . the you think this will help? >> we think this will immensel