Fact #99: September 13, 1999
Most Important Transportation Problem in 2020
In a random phone survey conducted for the National Renewable Energy Laboratory in August 1999, Opinion Research Corporation asked 1,008 adults to rank the following transportation problems in the order of importance to the United States in the year 2020.
- Traffic congestion
- Deaths and serious injuries in vehicle accidents
- Availability and/or price of gasoline
- Local air pollution from vehicles
- Global warming or global climate change caused by vehicles

Supporting Information
| Percentage of Respondents Ranking As: | ||||||
|---|---|---|---|---|---|---|
| Problem | Most Important Problem |
2nd | 3rd | 4th | 5th | Weighted Score (max of 5) |
| Congestion | 29% | 18% | 17% | 15% | 13% | 3.11 |
| Local Air Pollution | 19% | 28% | 17% | 18% | 8% | 3.02 |
| Global Warming | 17% | 15% | 14% | 15% | 27% | 2.44 |
| Deaths and Injuries | 16% | 14% | 23% | 17% | 21% | 2.60 |
| Gasoline Price/Availability | 15% | 17% | 19% | 22% | 18% | 2.62 |
| None | 4% | 7% | 10% | 13% | 13% | 1.17 |
| Total | 100% | 99% | 100% | 100% | 100% | |
|
Source: Opinion Research Corporation for NREL, August 5, 1999. Problems were read to the respondents in random order. Results have been adjusted to represent U.S. population. Weighted score is constructed from the percent of respondents ranking the problem as most important, 2nd , etc., with the most important problem receiving a score of 5 and the least important a score of 1. | ||||||