for people ages 18 years and up (full criteria)
Healthy Volunteers
healthy people welcome
at La Jolla, California
study started
completion around
Principal Investigator
by Katie Crist



The researchers are evaluating longitudinal changes in multiple health, economic, and environmental outcomes over a 3-year COVID recovery period and in the context of a new light rail transit (LRT) line, called the Mid-Coast Trolley, among 465 UC San Diego (UCSD) staff. The primary aim is to evaluate change in objectively measured total and moderate to vigorous physical activity (MVPA), travel mode, and vehicle miles traveled (VMT).


Physical Activity, active travel, equity, commute mode


You can join if…

Open to people ages 18 years and up

  1. are 18 years of age or older;
  2. are a full or part-time employee at UC San Diego
  3. Prior to COVID-19, you used to commute to La Jolla at least 2 days per week;
  4. have lived in the neighborhood selected for the study for at least one year;
  5. are able to walk without human assistance;
  6. are comfortable reading and writing in English or Spanish;
  7. have a reliable phone where you can be reached;
  8. spend most of your time in San Diego County;
  9. don't plan on moving in the next year;

    10. are able to give informed consent and comply with the protocol; 11. are willing to complete all assessments and wear all devices for 7 days at 3 different

    time points in the next 2 years.

You CAN'T join if...

1) pregnant, 2) mental state that would preclude understanding the protocol, 3) medical condition that would affect physical activity, 4) taking part in another physical activity related research study, and 5) live or regularly travel outside of San Diego County.


  • UC San Diego
    La Jolla California 92093 United States

Lead Scientist at UCSD

  • Katie Crist
    RSCH DATA ANL 3, Climate, Atmospheric Sciences, and Physical Oceanography, Vc-marine Sciences. Authored (or co-authored) 19 research publications


in progress, not accepting new patients
Start Date
Completion Date
University of California, San Diego
TROLLEY study protocol paper
Study Type
About 479 people participating
Last Updated