This post originally appeared on Orphan Road.
…and it’s far too late anyway. But what if instead of light rail over I-90, we just connected downtown Bellevue and downtown Seattle via gondola?
The two are just 6 miles apart. Yes, that’s huge for gondola distances. And over some deep water. But I feel like crunching some numbers, so humor me.
We’d definately want to use 3S technology – that’s two support cables and one drive cable. This would allow us to go 24 mph. So that would be a 15 minute journey. Hey, that’s much faster than Link’s 20 minute journey! Of course, South Bellevue station and Mercer Island would increase in travel time, but everything north of Bellevue won’t be affected much (transfer will surely take less than 5 minutes, when a car leaves every 30 seconds).
So a gondola would win in terms of speed. What about capacity? East Link will have a maximum of 4-car trains every 8 minutes going to the east side. If each car can hold 200 people, that’s 6,000 people per hour per direction. But wait, Whistler’s 3S system can carry 4,100 people per hour per direction. And with larger stations we could add more cars, bringing that number up.
This is the big unknown. Gondola systems are cheap compared to light rail systems, but keep in mind we’re really only comparing the section of light rail crossing I-90 (though this is probably an expensive stretch of rail). We would need to keep the rest of the planned system, even adding a storage and maintenance area, because East Link will serve much more than Bellevue. Also, we’d be crossing a deep lake. I have no idea how much towers going down 200′ to the floor of Lake Washington would cost, but I’m quite sure it wouldn’t be cheap (there’s a reason we use floating bridges around here). We could have high towers on either side and skip mid-lake towers (the lake is only 2 miles across), but that could be expensive too.
Well, I’m a day late and a dollar short on this one. Our entire region’s already agreed on a plan, and it’s likely a better plan than mine. Plus leaving the east side light rail disconnected from the west side light rail system kills all kinds of efficiencies. Then again, maybe I’m not thinking big enough. Why not branch out from Bellevue with gondolas?