I love this guy and have all his previous releases. This release has his trademark style but is quite a departure being an instrumental soundtrack to a short film. I might classify it's overall style as modern classical.
From what I glean from the video, the film was commissioned (?) by the Brooklyn Academy of Music. It is quite stunning. It is shot as 3 frames across the screen. At first I found this a bit disconcerting, but after a short while was fully absorbed in it. As the title indicates, it is an examination of the BQE from the road itself to the surrounding neighborhoods and streets. Starting with shots of the neighborhoods, it gradually builds, moving into scenes of and on the road itself. One scene which is tracked from the drivers point of view at high speed is exhilerating. It ends with some beautiful visuals of abstract lights and colors. Interspersed with the BQE scenes are 3 women playing with hula hoops, which may sound silly but is not. Some of these short interludes also feature very abstract, impressionistic filming. Overall, I appreciated and got a true feel for the BQE and it's surrounds as a living organism. The film demands repeated viewings, and I did not realize Sufjan was such an accomplished filmmaker. Be aware this is on the impressionistic "artsy" side which is fine by me.
As for the music, with lyrics this might not seem such a radical departure from his past efforts, but it is different. When listening to the music while watching the film I was very much reminded of Philip Glass or Steve Reich, though not as minimalist. The songs are orchestrated, and vary in style and dynamics. Some feature piano in the front, a couple trumpets and horns, and a couple more a music box (I think? lovely tinkling whatever it is). It is very hard to describe the overall sound and style Sufjan achieves here, but it does lean towards the modern classical realm.
If you are expecting a rehash of his earlier works you will be disappointed. If you approach this with fresh ears as I did, you might agree that this is a brilliant piece of work. Consider that this is a film score. In this regard the music is stronger when watching the film as it drives and complements the visuals. It brings them to life. Listening to the CD alone is still rewarding. Varied and complex, Sufjan has created a very strong "modern classical" score incorporating much of his "trademark" style. If you enjoyed his previous works I would recommend this, and it could likely extend his audience into different niches. I wonder where he will go next? ps - trying to read the cover abstractions is a bit of fun too!