That's a lot of sub_roadbarrier props. Can't say it's a bad thing unless these were placed badly, will see.
I'd suggest to close the huge gap on the right side @ 1:13, because that could confuse some players on the reverse route.
Also 1:36, that arrow wall on the right looks a bit bad to me. Pretty sure you can change the entire curve there to make it to look more appropriate. No real need to connect it to the sub_roadbarrier as it's done right now, IMO.
I'd suggest to close the huge gap on the right side @ 1:13, because that could confuse some players on the reverse route.
Also 1:36, that arrow wall on the right looks a bit bad to me. Pretty sure you can change the entire curve there to make it to look more appropriate. No real need to connect it to the sub_roadbarrier as it's done right now, IMO.