Masked passengers on an American Airlines flight to Charlotte, North Carolina, from San Diego, California, on May 20. | Sandy Huffaker/Getty Images

People are starting to commute and travel again, but no transportation mode is risk-free.

As many states begin to ease social distancing restrictions, some Americans are starting to travel again — within their own cities, states, and beyond.

While some regions, like Los Angeles and New York City, are still under lockdown, more than half of US states have partially reopened or released plans to do so. In some parts of Georgia, Texas, Florida, and South Carolina — despite the warnings from public health experts that testing needs to increase before social distancing measures can be relaxed — residents are gradually resuming their pace of life. Across the country, more Americans are returning to work, which means many will start commuting