What would be the range of impact of an individualized travel marketing program that covers 200,000 workers in Denver by 2022? The program would inform workers about mass transit options. Assume each worker drives 17.5 miles one way, 5 days a week with an average fuel economy of 18 mpg, before this program. What changes may be expected? Report the range of gasoline savings you would expect across Denver.

To calculate the range of gasoline savings that may be expected across Denver due to the individualized travel marketing program, you need to follow these steps:

1. Calculate the total number of miles driven by the workers per week:
Total miles driven per week = (17.5 miles * 2) * 5 days = 175 miles/week per worker.

2. Calculate the total number of gallons of fuel used per week by these workers:
Total gallons used per week = Total miles driven per week / Fuel economy = 175 miles/week per worker / 18 mpg = 9.722 gallons/week per worker.

3. Calculate the total number of gallons saved per week by implementing the travel marketing program:
Total gallons saved per week = Total gallons used per week (before the program) - Total gallons used per week (after the program).

4. To determine the range of gasoline savings, we need to calculate the minimum and maximum possible impact of the program. However, without further information, it is challenging to estimate the exact impact range. Several factors could influence the outcome, such as the effectiveness of the program, uptake by workers, and changes in behavior.

5. Consider the following potential scenarios to estimate the range:
a) If the program is highly effective and results in a significant shift in behavior, the impact range could be around 10-20% reduction in fuel consumption. Therefore, the gasoline savings range would be approximately 0.9722 - 1.9444 gallons/week per worker.
b) If the program has a moderate impact and leads to a modest behavior change, the impact range might be around 5-10% reduction in fuel consumption. Thus, the gasoline savings range would be approximately 0.4861 - 0.9722 gallons/week per worker.

Please note that these estimations are based on assumptions and it's essential to evaluate the specific details and effectiveness of the program to determine a more accurate range of gasoline savings.