A Transit Police officer who happened on a car just sitting on a Sullivan Square onramp up to I-93 north early Monday wound up arresting the driver, who was asleep behind the wheel with the lights off but the motor running, a gun loaded with eight rounds in the car with him, the Suffolk County District Attorney's office reports. Read more.

Taylor Donovan shows us the Expressway southbound in Dorchester around 3:30 p.m., just after the vice president's motorcade went through:

The Zoning Board of Appeal today agreed to reconsider its decision in May to reject a plan by the Polish-American Club on Boston Street to erect a new billboard on a pole next to I-93, not because the club has since sued the board but because its zoning lawyer has since filed detailed renderings of what the billboard would look like, information the board didn't have in May. Read more.

State Police report that when the driver of a Lexus SUV ride-share car suddenly slowed on I-93 northbound just past the Zakim around 10 p.m. on Saturday, a tow truck slammed into it, followed by a Civic plowing into the tow truck. Read more.

The signboards along the Expressway say drivers should expect delays between 1 and 3 p.m. today as the president arrives in town for his "cancer moonshot" speech at the JFK Library.

Only thing is the speech is at 4 p.m. And then the officials White House schedule says he'll be staying in town for a Democratic National Committee reception at 6 p.m. We'll go out on a limb and assume that's not at the neighboring Bayside DoubleTree, so that probably means a motorcade somewhere downtown or in the Back Bay. And then he departs Boston at 7:10 p.m., which means still more traffic issues as he gets taken to Logan.

Live Boston reports Boston firefighters extracted the driver of a car they found flipped over and atop a guardrail on the Expressway southbound in the area of Morrissey Boulevard in Dorchester around 2 a.m. on Friday.

On Aug. 21, 1969, three locomotives being readied to haul freight to Albany, NY escaped what is now the Cabot Yard in South Boston and barreled right into the Southeast Expressway, carving deep grooves in the roadway before they came to a halt and blocking northbound traffic.

Michael William Sullivan reports that the lead locomotive in the runaway express remains on the rails and doing hard work, now down in New Jersey. Read more.

Michael Spicher spotted some geese littles taking advantage of a puddle near the Expressway and the narrow end of Fort Point Channel that splits the South End from South Boston today. Amy Deveau, who lives nearby, though, is not liking the scene:

this stresses me out. I helped escort a family of geese under 93 and stopped traffic in both directions and when we all made it to the other side I burst into tears. I hope these lil guys make it back to the channel.

Heading north on the Expressway, Kevin Tinsley captured the flaming remains of a pickup rammed into by the driver of a Jeep near the Neponset Circle exit early this afternoon, creating a jam up that left 93 south at a standstill as police closed the road to allow firefighters to douse the flames. Read more.

State Police report a trooper who stopped a speeder on I-93 in Randolph after a license check showed the South Boston man had two outstanding felony warrants found the man had more than 2 1/2 pounds of packaged cocaine in his SUV. Read more.