This week's biggest headlines in transportation:
- Masks will be mandatory at LAX and on city buses beginning Monday
- Protected bike lanes coming to DTLA’s 7th Street
- Take a train, wear a mask!
- Tunneling milestone achieved on LA’s Purple Line metro scheme
- Major Orange County freeway closures planned: May 2-8
- How the coronavirus is hampering enforcement of California's air pollution rules
- Will our clean air last after COVID-19? UCLA study says it’s possible
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