The weekend before St. Patrick's Day means three parades and the annual dyeing of the Chicago River to turn it bright green.

The suburban bus agency already runs five express bus routes on the I-55 shoulder, two routes on the I-94 shoulder and six routes on I-90.

As the bus undergoes testing and prepares for public service, it paves the way for a potentially transformative shift in how we get around our cities. Would you feel comfortable riding a bus with ...