The good news: DART ridership, particularly light rail ridership, climbed by 120,000 in May (over May 2007). The bad news: So many people are riding some routes that odds are good if you’re younger, healthier and more polite, you’ll be standing. To deal with the rising number of riders (currently, an average of 1.25 riders per seat ride some trains), DART embarked on a $190 million program to swap existing railcars for larger ones that seat 25 more riders and offer bike racks and more standing space, according to the DMN. But the program won’t be fully implemented for a couple of years. Interestingly enough, bus ridership actually fell last month from the prior month and is 2% below that of May 2006.