# How Uber Calculates Ride-Pooling Times to Keep Detours Reasonable

> Uber's 2015 patent on matching multiple riders into a single shared vehicle by calculating whether the detour will keep everyone's arrival times within an acceptable limit compared to a private ride.

- **Patent:** US 9939279
- **Original title:** Method and system for shared transport
- **Owner:** Uber Technologies Inc
- **Granted:** 2018
- **Status:** Active
- **Times cited:** 49
- **Field:** software, ecommerce

## What it does

The patent describes a system that coordinates shared rides by balancing driver locations and rider wait times. When multiple people request rides, the system identifies nearby, available drivers using GPS data. It then calculates two durations: how long the trip would take if a rider rode alone, and a range of times for a pooled trip with detours to pick up others. The system sets a strict limit on how much longer the pooled trip can take compared to the solo trip. It only assigns a driver to a shared pool if the estimated pooled travel time falls within this acceptable limit, ensuring no rider faces an unreasonable detour. For example, if a solo ride takes 15 minutes, the system might set a limit of 25 minutes for a pooled ride; it will only group riders if the algorithm predicts the shared route stays under that 25-minute cap.

## What it does NOT cover

- Does not cover standard, non-pooled ride-hailing services where a driver only transports a single passenger or group from one point to another without detour calculations.
- Does not cover ride-pooling systems that group riders based purely on proximity without calculating or constraining the total trip completion time relative to a solo trip.
- Does not cover static transit routing systems like public buses or pre-scheduled shuttles that run on fixed routes regardless of real-time individual trip duration limits.
- Does not cover pooling algorithms that do not use real-time GPS data from the service provider's mobile device to determine proximity.

## The clever bit

Instead of just matching riders who are heading in the same direction, the system dynamically benchmarks the shared trip's duration against a hypothetical solo trip. By using the solo trip as a baseline constraint, the algorithm guarantees the detour remains mathematically tolerable before the driver is even assigned.

## Real-world examples

1. UberX Share (formerly UberPOOL)
2. Lyft Shared rides
3. Via shared shuttle services

## Why it matters

This patent protects the core algorithmic logic behind ride-pooling services like UberPOOL and Lyft Shared. By mathematically capping the detour penalty, it solved a major consumer pain point: the fear that a cheap shared ride might turn into an endless multi-hour journey. It allowed ride-hailing companies to maximize vehicle occupancy and lower prices while maintaining a predictable, acceptable user experience.

## Frequently asked questions

### What does How Uber Calculates Ride-Pooling Times to Keep Detours Reasonable cover?

Uber's 2015 patent on matching multiple riders into a single shared vehicle by calculating whether the detour will keep everyone's arrival times within an acceptable limit compared to a private ride.

### Who owns patent US 9939279?

Uber Technologies Inc owns this patent, granted in 2018.

### When does this patent expire?

This patent is expected to expire on April 10, 2038, when the invention enters the public domain.

### What is patent US 9939279 cited by?

This patent has been cited by 49 later patents that build on its ideas.

### What problem does this patent solve?

This patent protects the core algorithmic logic behind ride-pooling services like UberPOOL and Lyft Shared. By mathematically capping the detour penalty, it solved a major consumer pain point: the fear that a cheap shared ride might turn into an endless multi-hour journey. It allowed ride-hailing companies to maximize vehicle occupancy and lower prices while maintaining a predictable, acceptable user experience.

### What does this patent NOT cover?

Does not cover standard, non-pooled ride-hailing services where a driver only transports a single passenger or group from one point to another without detour calculations.

**Full plain-English explainer:** https://patentbrief.org/patent/us/9939279/uber-eta-prediction

**Original patent:** https://patents.google.com/patent/US9939279

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._