My recent column about a panhandling experience on a train at the airport station prompted MARTA’s police chief to write about the success of the transit agency’s Ride With Respect program. A Gwinnett businessman lobbies for an expansion of MARTA to that county. And an Atlanta attorney calls for improvements in truck fleets that could prevent deadly accidents — such as the recent I-16 tragedies — allegedly caused by tractor-trailer drivers who crashed into traffic standstills.