# Fundamentals of Transportation/Trip Generation/Additional Problems

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## Additional Problems

1. Are number of destinations always less than origins?
2. Pose 5 hypotheses about factors that affect work, non-work trips? How do these factors affect accuracy, and thus normalization?
3. What is the acceptable level of error?
4. Describe one variable used in trip generation and how it affects the model.
5. What is the basic equation for normalization?
6. Which of these models (home-end, work-end) are assumed to be more accurate? Why is it important to normalize trip generation models
7. What are the different trip purposes/types trip generation?
8. Why is it difficult to know who is traveling when?
9. What share of trips during peak afternoon peak periods are work to home (>50%, <50%?), why?
10. What does ORIO abbreviate?
11. What types of employees (ORIO) are more likely to travel from work to home in the evening peak
12. What does the trip rate tell us about various parts of the population?
13. What does the “T-statistic” value tell us about the trip rate estimation?
14. Why might afternoon work to home trips be more or less than morning home to work trips? Why might the percent of trips be different?
15. Define frequency.
16. Why do individuals > 65 years of age make fewer work to home trips?
17. Solve the following problem. You have the following trip generation model:

$Trips=B_{1}Off+B_{2}Ind+B_{3}Ret$ And you are given the following coefficients derived from a regression model.

```B_1 = 0.61
B_2 = 0.15
B_3 = 0.123
```

If there are 600 office employees, 300 industrial employees, and 200 retail employees, how many trips are going from work to home?