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Archive for the ‘Priority queues’ Category

495-logoSlate has an article that asks an intriguing question: Who Really Benefits From “Big Data”? (Dec 27). That’s clearly something of a loaded question. Big Data is currently everyone’s favorite answer for everything. The ability to leverage vast amounts of data for new insights and improved decisions holds a lot of promise. There are also many success stories of firms creating new markets or improving profitability or providing great value to customers to back up claims and bolster expectations. Big Data has remade baseball with an emphasis on new statistical measures and has allowed Netflix to suggest the perfect next movie to watch.

Those examples sound great. Of course, consumers may be less enthusiastic about one of the longer standing examples of Big Data, airline revenue management systems. While these have been around for a couple of decades,they bear the hallmarks of Big Data applications. They are built on careful data analysis to forecast how systems will evolve and seek to replace intuition with frequent, reasoned decisions. These decisions may not necessarily be optimal but they clearly balance costs and benefits and can be improved over time. I’m not sure that customers love revenue management systems the way they love Netflix recommendations. Although revenue management systems are just as responsible for some sweet deals as they are over for extravagantly priced tickets, people tend to focus on the latter. Consequently, if you ask who benefits from Big Data and lead with revenue management systems as an example, I would venture that many customers would be leery of embracing Big Data.

So what example does the Slate article go with in thinking about Big Data? Lexus Lanes on the DC Beltway!

Advances in real-time data acquisition, processing, and display technologies means that it is possible to design a toll road that can continually change prices to control how many cars are on the road and how fast they are going. These “hot lanes“ have just been opened along a part of the Washington, D.C., Beltway, the 10-lane, traffic-infested artery that to normal humans is a metaphorical boundary between the real, outside-the-Beltway world and the weird, political one on the inside. (For those of us who live around Washington and must drive on it, however, the Beltway is very concrete indeed, a daily flirtation with delay and frustration, homicidal instincts, and death itself.)

At a cost of $2 billion, a private sector partnership (which gets to keep the tolls) has built a 14-mile-long, four-laned section of highway, parallel to the main lanes of the toll-free Beltway, and has guaranteed to the state of Virginia that it will always keep traffic moving at no less that 45 mph along its length. They do this by continuously monitoring the number of cars (which must be equipped with EZ-Pass transponders) and their speed, and by raising toll prices as necessary to keep the number of cars on the road at a level that will allow the speed to stay at or above the guaranteed minimum. The dynamic toll prices are displayed on huge signs near the entrances to the smart-highway lanes, so drivers get to decide at the last minute whether they want to spend the money to go faster or not. As the traffic on the toll-free Beltway lanes gets worse, some drivers will be willing to spend more to go faster. The worse the traffic is, the more they’ll have to spend. (In the early days of this new technology, numerous accidents were caused by drivers trying to decide how much they were willing to pay, but no doubt this initial problem will sort itself out as people get used to driving-while-economically-rational.

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When’s it OK to buy your way to the front of the line? That is essentially the question behind a report on the BBC website (Priority queues: Paying to get to the front of the line, Oct 10). That essay is a distillation of a longer podcast that is well worth a listen:


The starting point of the article is that priority service has become fairly ubiquitous from airports to amusement parks to expressways.

But today, many Americans are waiting in a new kind of queue – the priority queue, where certain customers get higher priority because they pay.

In American airports, priority queues are now visible everywhere – at the check-in counter, at security and at boarding gates. Many airlines now board their passengers according to the amount of money they’ve paid for their ticket. …

Take the Six Flags White Water amusement park in Atlanta, which implemented a priority queue system in 2011.

Some guests simply queue up for their rides. Those who purchase green-and-gold wrist bands – fitted with radio frequency technology – are able to swim in the pool or eat snacks before being alerted to their turn.

Guests who pay an even higher fee – roughly double the price of admission – get the gold flash pass, cutting their waiting time in half. …

In October 2011, Atlanta created a priority lane on the highway [I-85] for drivers with a Peach Pass – the price of driving in the lane changes depending on how much traffic there is.

Critics call them “Lexus lanes”, because they claim the lanes benefit only the rich who can afford expensive cars.

Aside from the cost of the express lanes, some drivers are also upset that they replace car pool lanes – special lanes for cars with two or more passengers.

Overnight all the car pool drivers who used to ride free were pushed into the general lanes, making traffic worse for everyone except those who pay.

After the various examples, it builds to this:

Americans have a deep-rooted belief in the market and since priority queues can generate revenue it’s no surprise that they are turning up in the public sector as well.

But are traditional American values like fairness and equal opportunity really compatible with letting someone buy their way to the front of the line? And what happens when the people who pay more want more?

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