TRPA has been at the forefront of environmental stewardship through data-driven decision making since its inception. The performance measurement framework supports our understanding of the system’s operating effectiveness and helps to identify the projects and programs that will most effectively lead to the achievement of regional goals.
Recent federal transportation legislation (MAP-21 & FAST Act) has introduced new requirements for metropolitan planning organizations to use performance-based planning as part of regional transportation planning. TRPA has carried out performance-based planning at the regional scale for many years through the Region's threshold evaluation and transportation monitoring reports (Threshold Evaluation Reports, 2016 Bike/Ped Report, 2014 Transportation Report)
TRPA has developed a list of transportation measures that are used for performance-based planning (List of Measures). Monitoring and data collection for these measures is ongoing and will be accessible below as data becomes available.
TRPA and its partners monitor conditions, collect data, and evaluate them to inform transportation policy and programs. Existing and ondoing TRPA monitoring programs include Bicycle/Pedestrian, Transit, Safety, Congestion, General Roadway, Parking, Travel Behavior, and Parking. Specific data are collected per prescribed data collection and monitoring protocols which make it reproducible, consistent, and reliable for analysis and informed decision making. Multimodal data collection and monitoring protocols provide standardization and guidance for partners to consistently collect the fine-grained modal data necessary to support the performance measurement framework. These protocols yield robust data that facilitate direct “apples to apples” comparison and trending over time, meet federal, state, and local requirements, and drive achievement of regional goals.
Select from the list of monitoring programs below for more detailed information on each individual program. The Transportation Monitoring page is currently under development and will include all transportation monitoring information, raw and analyzed data downloads, and additional tools and reports. Please check back regularly to utilize these updates as they progress.
In 2015, as part of the update to the Active Transportation Plan, TRPA developed the Lake Tahoe Region Bicycle and Pedestrian Monitoring Protocol using best industry practices and national experts Kittleson & Associates. TRPA began implementation in summer of 2015, which built on and integrated previous monitoring efforts. In partnership with local agencies, TRPA has established a system for the collection of year-round active transportation data which includes permanent counting stations, biennial count locations, and spot count locations depending on need. During the first two years of implementation, TRPA produced a bicycle and pedestrian monitoring report which analyzes historical trends, provides detailed information by location, and compares use at similar sites. This report also supplemented the regional transportation monitoring report. Moving forward, all analysis and up-to-date data will be available on the transportation monitoring dashboard, in lieu of a hardcopy report.
To download all Bicycle & Pedestrian data please visit Tahoe Open Data.
Safety performance measures help to assess fatalities and serious injury on all public roads regardless of ownership or functional classification. These measures are required to be incorporated into the regional transportation plan and state’s Highway Safety Improvement Programs. To support meeting these targets, a Lake Tahoe Region Safety Plan is underdevelopment which outlines crash trends, risk factors, gaps in data, and recommends strategies and designs to improve safety for all roadway users. Crash data is provided by the state of California and Nevada and consolidated by TRPA.
To download crash data please visit Tahoe Open Data.
Congestion can be characterized by many metrics and sourced from a variety of different data sources. For the purpose of analyzing congestion in the Tahoe region, TRPA collects data from Inrix and has calculated a congestion index for different multidirectional roadway segments. The congestion index measures the observed speed of a roadway segment in relation to the typical speed of that roadway segment. A roadway segment with a lower (negative) value indicates higher congestion. Lower negative values indicate that the observed speed on a roadway segment is much slower than the expected speed.
TTD, TRPA, and TART work together in corridor and transit planning. Consistent transit rider surveys and operations data collection help determine the need for additional services and operating hours. Based on reporting requirements, TRPA's Productivity Improvement Program (PIP), and goals outlined in the Regional Transportation Plan, Long Range Transit Master Plan, and each transit agency's Short Range Transit Plans, the Tahoe transit monitoring program is built to track the following: Deadhead Miles and Hours, Ridership, Transit Mode Share, Productivity, On Time Performance, Operating Cost, Farebox Recovery, Rolling Stock, Equipment, Facilities, and Infrastructure. To find out more about these performance measures, take a look at the Tahoe Transit Monitoring Program: Monitoring Protocol.
Traffic volume monitoring is part of a regional strategy to create a well executed transportation management system that incorporates monitoring data, real-time information, and dynamic operations that respond to seasonal and periodic congestion. Over the last few years, intelligent transportation systems have seen significant advancements and deployments in the areas of data collection, data sharing, mobile solutions, and traffic monitoring capabilities. Both the California Department of Transportation (Caltrans) and the Nevada Department of Transportation (NDOT) manage several dozen permanent traffic count stations, which collect data on the number of vehicles traveling throughout the region. TRPA aggregates and analyzes this data for a variety of purposes, including project planning, development of our Regional Transportation Plan, and travel demand modeling.
To download all of the traffic volume data on this page please see Tahoe Open Data.
The U.S. Census Bureau collects and distributes data under a handful of different programs. Two of the more commonly used programs are the Decennial Census and the American Community Survey (ACS). The Decennial Census is a definite source of demographic data but only is collected every ten years; it includes a limited number of variables such as number of households and total population. The ACS is a program that provides data estimates on a one, three, and five year timeline; ACS data is collected more frequently but the data estimates have a margin of error that must considered because the data is taken from a small sample of the total population. The ACS includes many more variables compared to the Decennial Census that relate to transportation, income, and housing. Both the Decennial and ACS datasets have similiar data structures. Each row in both datasets include a particular variable and a number the indicates the total number of households or persons that characterize that variable. Currently, data is available for the ACS for years 2010-2016 and for the Decennial Census in 1990, 2000, & 2010. The 2017 ACS 5-year estimate will be published in December of 2018.
Navigate the dashboard below to explore different aspects of the census data. The first tab displays a few high level data points. The two tabs to the right show all of the census variables that are available (there are thousands of available data points). To the far right, you can find the census GIS layers (tracts, block groups, & blocks).
TRPA uses data-driven decision making and performance-based planning to assess our transportation system and identify projects and programs that will achieve regional goals. Below are a sample of the measures that TRPA uses for performance-based planning.