VPM: Vert per minute

Ski lift data, sorted. By http://awf.fitzgibbon.ie

What do you want from a ski lift? I know, I know: no queues, accesses great terrain, a big “Experts only” sign to scare away the riffraff. But you can determine all of that stuff fairly easily by studying the map, and I’m assuming that you already ski at off-peak times, in whiteouts, using the singles line, and generally manage queueing efficiently yourself.

But sometimes you just want to get lots of laps in, with the greatest possible height gain in the least time. You know some of the rules: use the steepest lifts, try the gondolas, but is it better to take that 7-minute fast chair or the steep 10-minute T bar? So I want to maximize VPM (Vert per Minute).
The excellent folks at sielbahntechnik.net have the data needed to compute VPM, but it’s not explicitly there, so these pages present the computation for some resorts of interest to me. Runs are manual, to avoid spamming seilbahntechnik.net, so post a github issue if you want a new one done, or better still, run the code.

Note that we are definitely in pinch of salt territory here. The line length and vertical gain figures are pretty solid, but the ride time is generally not very accurate. Lift operators run the lift slower or faster depending on conditions, possibly varying the ride time by a factor of two or more from these estimates. The entries marked [*] have had ride time computed from the line speed, which is again pretty nominal, and for some lifts you can see entries for both the estimated and supplied ride times, which typically differ by about 15%.

Lift type also plays a rôle. Most of the high-VPM lifts are cable cars or trains, which don’t run continuously, so when you factor in a wait time that’s typically the same as the ride time, they can be less attractive (although still pretty good, especially if you know one is coming soon). Similarly, the next class is high-speed gondolas, where wait time (ignoring queueing) is much smaller, but you still need to take your skis off and trudge through some infrastructure. Perhaps add a minute to the ride time for these, discounting vpm by 10-30%. For me, the kings of the mountain are the high-speed detachable chairs (CLDs below). There’s no faff time, and you’re skiing the moment you get to the top.

Running the code.

PS> . ./setup # installs HtmlAglityPack
PS> ./make-vpm 'Whistler' # Generates data/Whistler.{md,csv}
PS> git add data/Whistler.*
PS> git commit -m 'DATA: Whistler'
PS> git push # update gh pages

Types

ENG FRA DEU English Francais Deutsch
ATW TPH PB Aerial Tramway Téléphérique Pendelbahn
MGD TCD EUB Monocable gondola detachable Télécabine (débrayable) Gondelbahn, Einseilumlaufbahn
BGD 2S ZUB Bicable gondola detachable Téléphérique débrayable Gondelbahn, Zweiseilumlaufbahn
TGD 3S 3S Tricable gondola detachable Téléphérique 3S 3S-Bahn
MGFP TCP GUB Monocable gondola fixed grip pulsed Télécabine pulsée Einseil-Gruppenumlaufbahn
MGFJ NA GPB Monocable gondola fixed grip jigback ? Einseil-Gruppenpendelbahn
BGFP TPH ZGPB Bicable gondola fixed grip pulsed pulsé Zweiseil-Gruppenumlaufbahn
CLF TSF SB Chairlift fixed grip Télésiège à pince fixe Sesselbahn fix geklemmt
CLD TSD KSB Chairlift detachable Télésiège débrayable kuppelbare Sesselbahn
CGD TMX KSG Chairlift gondola detachable Télé(cabine) mixte Kombibahn (Sessel + Gondel)
FT FT FT Funitel Funitel Funitel
FUF FUF FUF Funifor Funifor Funifor
RPC     Rope conveyor   Materialseilbahn