Quote:
Originally Posted by electricron
Just wanted to put out this rule of thumb, whether you think it's valid or not.
A highway lane can carry 2,000 vehicles per hour. Assuming the highway is expand to 4 lanes, 2 lanes per direction, it'll be able to handle 4,000 vehicles per hour. It'll take 6 hours to move 24,000 vehicles over that single highway.
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So does this sound right?
The current plan is to have 3 out of the 4 lanes on FM 812 going in the primary traffic direction -- to the track before the event, away from the track afterwards. So that would be 6000 vehicles per hour, or 4 hrs to move 24,000 vehicles on 812 from one direction.
But there will also be some vehicles coming from the other direction, I'd imagine. The 2000 vehicles per hour only applies to one direction coming in, right? That would be as if the road dead-ended into the track?
So if they did contra-flow on both directions of FM 812, that would be 6 lanes coming in and 6 lanes going out (after the event). So 12,000 vehicles per hour (probably a little less than that, I know, with traffic lower from the east)... so lets say 10K vehicles per hour. So now we're down to 2.5 hrs.
Plus, there is Elroy road. It's 1 lane in either direction (2 lanes total), and we'll count only one direction since on side ends on FM812. But it still has it's own entrance to CoTA before that, so it's a valid alternate route from either Austin (Burleson Rd) or other cities (via 130). So if they contra-flowed that entire road, that would be an additional 2 lanes for 4000 more cars per hour. So now we're up to 14,000 vehicles per hour so less than 2 hours to fill up the entire 25,000K spaces at the track.
BTW, part of the latest permits issued by the county include requirements for a plan to widen Elroy road. Also, the TxDOT improvements to FM812 (making it 4 lanes) will begin in September and be completed around the end of the year, in plenty of time for the first race. Since they'll be restriping and building the exits/entrances to the CoTA with the contra-flow plan in mind, that should help make things work really well. In theory, anyway.