ITS Berkeley

Where the Crosswalk Ends: Mapping Crosswalk Coverage via Satellite Imagery in San Francisco

Moran, Marcel E.
2022

Marked crosswalks are the primary means of safeguarding pedestrian travel at intersections in American cities. In the face of decades-high pedestrian fatalities nationwide, the provision of adequate cross walks is highly salient. Though, how they are spatially distributed across an entire city, and vary by neighborhood, has drawn little academic scrutiny. Given that, this study utilizes satellite imagery to map the presence of marked crosswalks throughout San Francisco, a dense, walkable city that has struggled to reach its pedestrian-safety goals. For the first time, this allows for a...

New Metrics for Measuring Academic Research Outside the Ivory Tower

Levine, Kendra K.
2019

The need to demonstrate the value of research programs is critical for funding sustainability, particularly in the 21st century where research funding is rarely guaranteed beyond the life of a single project. After the great economic crash of 2008 many research programs have also diversified their funding portfolios, which means cultivating new relationships with funders and potentially different objectives of research projects. Measuring the impact of academic research outside academia is critical to providing a holistic view of a research program, but the methods to do so are still being...

What Can You Do with a County Road that You Can’t Afford to Maintain?

Jones, David
2017

Many rural county road networks were created at a time when funding was greater and rural populations were often larger than they are today. Eventually, surface treatments such as chip seals or thin asphalt were applied to many of these gravel roads to provide them with an all‐weather surface. These treated surfaces were also desirable because conventional gravel roads are dusty, often develop wash boarding quickly, and have high rates of gravel loss—which result in unsafe and uncomfortable conditions and greater damage to vehicles and crops. A solution to this problem is called ‘unpaving...

Smartphone Applications and Data Impacting Transportation

Shaheen, Susan, PhD
Cohen, Adam
2018

Demographic shifts, improvements in computing power and mapping technology, the use of cloud computing, and changes in wireless communication —coupled with the growth of data availability and data sharing —are changing the way people travel. Increasingly, mobility consumers are turning to smartphone “apps” for a wide array of transportation activities including: vehicle routing, real-time data on congestion, information regarding roadway incidents and construction, parking availability, and real-time transit arrival predictions. Travel time savings (e.g., high occupancy vehicle lanes...

User Acceptance and Public Perception Regarding Automated Driving Systems

Motamedi, Sanaz
Wang, Pei
Chan, Ching-Yao
2018

Fully Automated Driving System (ADS) is one of the most innovative and fundamentally disruptive changes in transportation. This technology has the potential to resolve or mitigate current transportation problems, including reducing traffic accidents, congestion, energy consumption, and pollution. However, the extent of these impacts will depend heavily on public perception and widespread adoption of ADSs. To gain a better understanding of user acceptance and public perception related to ADS, extensive interviews were conducted with Tesla end-users who have experience using partial ADS (i.e...

Fundamentals of Traffic Engineering - 16th Edition

Homburger, Wolfgang S.
Hall, Jerome W.
Reilly, William R.
Sullivan, Edward C.
2007

This syllabus serves as an introduction to the field of traffic engineering to professionals who are being assigned traffic engineering tasks for the first time and as a source of recent information for those already in the field. It is designed mainly for one-week short courses, but past editions have also seen increasing use in university engineering courses and for individual study. Traffic engineering is an ever-changing profession. New standards, guidelines, and basic texts rapidly replace older reference volumes. This 16th edition again includes new and revised material needed by...