Related Experiment Video
Updated: Sep 21, 2025
14:55
Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
Published on: January 20, 2023
3.5K
Do ridesharing transportation services alleviate traffic crashes? A time series analysis
Muhammad Arif Khan1, Roya Etminani-Ghasrodashti1, Sharareh Kermanshachi2
1Center for Transportation Equity, Decisions and Dollars (CTEDD), University of Texas at Arlington, Arlington, Texas.
Traffic Injury Prevention
|May 31, 2022
Summary
On-demand ridesharing services like Via significantly reduced traffic crashes and injuries in Arlington, TX. While serious injuries were unaffected, the study highlights potential for safer, sustainable urban transportation.
Area of Science:
- Transportation Science
- Urban Planning
- Public Health
Background:
- On-demand ridesharing services offer potential benefits like improved mobility and reduced emissions.
- The impact of ridesharing services on traffic safety, specifically crash rates, remains unclear.
- Investigating services like Via in cities like Arlington, TX, is crucial for understanding their safety implications.
Purpose of the Study:
- To analyze the effect of introducing the Via ridesharing service on traffic crash occurrences in Arlington, Texas.
- To determine if ridesharing adoption correlates with changes in traffic crashes, injuries, and serious injuries.
- To assess the broader implications for urban transportation safety and sustainability.
Main Methods:
- Utilized an Interrupted Time Series Analysis (ITSA) methodology.
- Analyzed weekly traffic crash data, including total crashes, injuries, and serious injuries in Arlington from 2014 to 2021.
- Focused on the period before and after the introduction of the Via ridesharing service.
Main Results:
- A statistically significant decrease in the weekly number of total traffic crashes was observed.
- The number of weekly injuries also showed a statistically significant reduction.
- No significant impact was found on the number of serious injuries following the service's launch.
Conclusions:
- Ridesharing services, such as Via, demonstrate a capacity to reduce overall traffic crashes and injuries in mid-sized urban environments.
- While not impacting serious injuries in this study, the reduction in total crashes and injuries suggests a positive safety contribution.
- Findings support policymakers in leveraging ridesharing for developing safer and more sustainable urban transportation systems.
Related Concept Videos
01:41Social Traps
23.6K
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned...
23.6K
01:16Hypothesis Test for Test of Independence
3.8K
The test of independence is a chi-square-based test used to determine whether two variables or factors are independent or dependent. This hypothesis test is used to examine the independence of the variables. One can construct two qualitative survey questions or experiments based on the variables in a contingency table. The goal is to see if the two variables are unrelated (independent) or related (dependent). The null and alternative hypotheses for this test are:
H0: The two variables (factors)...
H0: The two variables (factors)...
3.8K
01:17Probability Histograms
12.2K
A probability histogram is a visual representation of a probability distribution. Similar a typical histogram, the probability histogram consists of contiguous (adjoining) boxes. It has both a horizontal axis and a vertical axis. The horizontal axis is labeled with what the data represents. The vertical axis is labeled with probability. Each rectangular bar in the histogram is 1 unit wide, which suggests that the area under each bar equals the probability, P(x), where x is 1, 2, 3, and so on.
12.2K
01:21Introduction to Test of Independence
2.5K
In statistics, the term independence means that one can directly obtain the probability of any event involving both variables by multiplying their individual probabilities. Tests of independence are chi-square tests involving the use of a contingency table of observed (data) values.
The test statistic for a test of independence is similar to that of a goodness-of-fit test:
The test statistic for a test of independence is similar to that of a goodness-of-fit test:
2.5K
02:12Short-distance Transport of Resources
16.5K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.5K
01:15Elastic Collisions: Case Study
14.4K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
14.4K