Earthweek Sustainability Indicators
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The document summarizes sustainable transportation indicators presented at an Earth Day summit. It discusses defining sustainable transportation as meeting present needs without compromising future generations. Key aspects of sustainable transportation include understanding, quantifying, and applying indicators to benchmark performance over time in a way that is accurate, measurable and shows trends. The document provides examples of sustainability objectives and measures used by TxDOT to reduce congestion and enhance safety while improving air quality and the economy. It describes using an Excel-based calculator to model current and future conditions on a highway and show results graphically.
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Earthweek Sustainability Indicators
- 2. Timeline Past Present Future Indication of Clarity
- 3. Where Have We Been?
- 6. Highway 59 On a Good Day
- 7. Highway 59 On a Bad Day
- 11. Key Thrusts for Sustainable Transportation Understand Quantify Apply Sustainable Transportation
- 13. Sustainability and TxDOT Goals Dimension Goals Social Reduce Congestion Enhance Safety Economic Expand Economic Opportunity Preserve Value of Transportation Assets Environmental Improve Air Quality
- 14. Sustainability Objectives and Measures TxDOT Goal Sustainability-Related Objective Performance Measure Reduce congestion Improve mobility on highways Travel time index Improve reliability of highway travel Buffer index Enhance safety Reduce crash rates and crash risk Annual severe crashes per mile Improve traffic incident detection and response Percentage lane-miles under traffic monitoring/surveillance Expand economic opportunity Optimize land-use mix for development potential Land-use balance Improve road-based freight movement Truck throughput efficiency
- 15. Sustainability Objectives and Measures TxDOT Goal Sustainability-Related Objective Performance Measure Preserve the value of transportation assets Reduce cost and impact of highway capacity expansion Capacity addition within available right of way Leverage non-traditional funding sources for highways Cost recovery from alternative sources Increase use of alternatives to single-occupant automobile travel Proportion of non-single-occupant travel Improve air quality Reduce adverse human health impacts and comply with ambient air quality standards Air Quality Index Reduce greenhouse gas emissions Daily CO 2 emissions
- 18. Results: Graphs
- 19. Results: Graphs
Editor's Notes
- Nicolas Cugnot – first traffic accident in 1771. Speed of 2.5 mph
- Tropical storm Allison 2001
- Earlier, we touched upon the three dimensions of sustainability – the social ,economic, and environmental. This table shows how the sustainability dimensions are addressed by the goals in the strategic plan. This is a very loose classification. For example, the goal of improving air quality does directly impact the environmental sustainability dimension. However, improved air quality can also be linked to human health improvements, and can be considered a social benefit. Similarly, most other goals address different facets of sustainability. Invite participants to discuss the multiple linkages between TxDOT goals and the sustainability dimensions. Note responses on a flip chart or white board. Revisit these responses as appropriate while discussing the subsequent slides.
- This table shows the objectives and performance indicators developed for the first three goals. Discuss the sustainability objectives and the measures for each goal. The travel time index and buffer index look at mobility and reliability of highway travel. These are quantified based on traffic volumes, lane configurations, and speed estimation from these Annual severe crashes are estimated using crash prediction models that also make use of traffic data and roadway classification and geometrics Lane miles under traffic monitoring and surveillance is self explanatory and looks at the presence of TMC facilities Land Use balance is quantified based on the classification of land use along a corridor ½ mile to either side of the roadway Truck throughput efficiency is a function of truck volumes and truck speeds along a corridor
- This table shows the objectives and performance indicators developed for the remaining two goals. Discuss the sustainability objectives and the measures for each goal. The capacity addition measure looks at the potential for adding highway capacity within existing right of way Cost recovery from alternative sources quantifies the benefit of non-DOT funding sources for both capital and O&M expenditures, including toll revenue, private sector partnerships, etc. Proportion of non-single occupancy travel is quantified on the basis of the proportion of passenger miles of travel in any mode other than a single –occupant automobile. This includes transit, carpooling, and high occupancy vehicles. The air quality index is a function of an areas nonattainment status for Ozone, Carbon Monoxide and Particulate Matter as well as toxic pollutant emissions associated with these (Oxides of Nitrogen, Volatile Organic Compounds, Carbon Monoxide and Particulate Matter) The final measure quantifies daily Carbon Dioxide emissions Both the air-quality related measures are quantified based on emissions rates, vehicle speeds and traffic volumes.
- The first application is for an approximately 15 mile length of US Highway 281 in San Antonio. This is an example that has both urban and rural characteristics. It starts off near the downtown area, at the intersection with I-410, and ends near the Bexar county line. The base case was considered to be 2005, and the future projected for 2025.
- Discuss the results shown here. Encourage questions/participation from workshop participants.
- Discuss the results shown here. Encourage questions/participation from workshop participants.