I like the design, but would like purple to be the primary color, especially for the word PEDS. The Try green or a stronger orange as a secondary color. The shade of purple we like is R=60; G=49; B=146. The traffic signal blocks the P, so it would be better to avoid this. Also try making the crosswalk similar to the shape we use currently at in our current logo at peds.org. Not essential, but it it's worth trying.
In # 15, try omitting the traffic signal and leaving some white space between the word PEDS and the curving line beneath it (as you did in #19). Also try using Pantone 1665 or 390 for the curving line. I'd also like to see a version without the curivng line, but instead having the crosswalk curve more, as we have that in our current logo at peds.org. In this, the size of the crosswalk bars varies a bit more than you have them. A lighter shade of purple (as we have it in our current logo) is also worth trying. I'm not a designer, so I don't know what the proper term for that is (more white? or more transparency?)