I had commented on someones question elsewhere regarding Theoretical Hourly Ride Capacities (THRC) and Queue Line Length Estimation and thought I would share with you guys. If you guys have questions or are curious about more information, or even have notes to offer, feel free to comment.

Ride Capacities are dependent on a number of factors that is unique to every coaster and attraction. Which means that capacities need to be calculated for each attraction. Capacity is dependent on the following variables:

Queue line length is more complicated of a calculation and has many different ways, with many different parts, to determine it. One quick estimation that can be done is as follows:

Assuming your attraction has a THRC of 1440 pph, and you expect your coaster to be pretty popular (about 90min wait), you would need to design your queue to hold 1.5hrs worth of guests on an attraction that processes 1440 pph:

These calculations can be applied to a number of different attraction formats. For example, a flat ride's capacity would be determined the same way except that the capacity would equal the number of seats, the number of trains would be only 1, and the duration would be the the time from when the ride starts its cycle to the time it starts its next cycle.

Shows can follow a similar calculation as flat rides do but are more traditionally determined by the number of cycles per hour the show occurs. If a theater can hold 1000 people, and the show cycles twice an hour, then the hourly capacity is simply 2 times 1000 people, or 2000 people per hour.

The standard calculations become a little more complex for attractions like continuously moving omnimovers (Haunted Mansion), coasters with dual loading stations side by side (California Screamin'), coasters with two loading platforms in tandem (Space Mountain at Disneyland), separate load and unload platforms (Expedition Everest), and trackless dark rides or batch loading (Mystic Manor or Radiator Springs Racers), free-flow walkthrough attractions (Enchanted Storybook Castle), pulsed walkthrough attractions (Enchanted Tales with Belle). All of these formats tend to increase the capacity by increasing the flow of guests through the attraction or streamlining the load/unload process which reduces the duration value, D.

An interesting attraction to note is the new Ropes Course at Shanghai Disneyland ( The Challenge Trails at Camp Discovery). Traditionally a low capacity attraction, Disney increased its throughput with the following:

**ATTRACTION CAPACITY**Ride Capacities are dependent on a number of factors that is unique to every coaster and attraction. Which means that capacities need to be calculated for each attraction. Capacity is dependent on the following variables:

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One basic formula for determining an attractions capacity is as follows:D = Ride Duration in minutes (total time from when a vehicle dispatches/ride cycle begins to the moment when that vehicle dispatches again. Basically Ride time + Load/unload time)(El Toro averages at 4.5 min)

C = the capacity of a train/vehicle (El Toro train has capacity of 36 ppl)

T = the number of trains/vehicle units (El Toro at peak runs 3 trains)

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Using El Toro as an example,THRC (Theoretical Hourly Ride Capacity) = (60*T*C)/D

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This value indicates how many people the attraction can process in one hour.D = 4.5 min

C = 36 ppl

T = 3 trains

THRC = (60 x 36 x 3)/4.5 = 1440 pph (people per hour)

**QUEUE LINE LENGTH**Queue line length is more complicated of a calculation and has many different ways, with many different parts, to determine it. One quick estimation that can be done is as follows:

Assuming your attraction has a THRC of 1440 pph, and you expect your coaster to be pretty popular (about 90min wait), you would need to design your queue to hold 1.5hrs worth of guests on an attraction that processes 1440 pph:

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Industry Standards suggests that queue lines have about 4 sqft of standing room per person and assuming a queue width of 5 ft wide:Queue Capacity = Wait time x THRC

Queue Capacity = 1.5hrs x 1440pph = 2160 ppl

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For comparison, El Toro's Queue line is approximately 1500 ft long.Area per Person = 4 sqft/person

Queue Width = 5 ft

Approximate Queue Length = (Queue Capacity x Area per Person)/Queue Width

= (2160 x 4)/5

= 1728 ft of queue

**ADDTIONAL THOUGHTS**These calculations can be applied to a number of different attraction formats. For example, a flat ride's capacity would be determined the same way except that the capacity would equal the number of seats, the number of trains would be only 1, and the duration would be the the time from when the ride starts its cycle to the time it starts its next cycle.

Shows can follow a similar calculation as flat rides do but are more traditionally determined by the number of cycles per hour the show occurs. If a theater can hold 1000 people, and the show cycles twice an hour, then the hourly capacity is simply 2 times 1000 people, or 2000 people per hour.

The standard calculations become a little more complex for attractions like continuously moving omnimovers (Haunted Mansion), coasters with dual loading stations side by side (California Screamin'), coasters with two loading platforms in tandem (Space Mountain at Disneyland), separate load and unload platforms (Expedition Everest), and trackless dark rides or batch loading (Mystic Manor or Radiator Springs Racers), free-flow walkthrough attractions (Enchanted Storybook Castle), pulsed walkthrough attractions (Enchanted Tales with Belle). All of these formats tend to increase the capacity by increasing the flow of guests through the attraction or streamlining the load/unload process which reduces the duration value, D.

An interesting attraction to note is the new Ropes Course at Shanghai Disneyland ( The Challenge Trails at Camp Discovery). Traditionally a low capacity attraction, Disney increased its throughput with the following:

- Creating a linear experience as opposed to free flow. Meaning, guests follow a path that starts at one point and finishes at another without ever returning to a previous section.
- Adding 3 paths, on 2 courses (total of 6 paths)
- Segmenting the load process into multiple components. Meaning, guests are first split into groups, then move foward to then be given a harness. Then proceed forward to then step into harness. Then move forward again for harnesses to be tightened and adjusted. And then move forward to be clipped in before being let off into the course.