Very nice composition and pose. In the second picture, the backs of cars is not a super-gorgeous background. Looks kind of like she just wandered out into traffic. Shorter DoF might've made that less distracting.
As others have pointed out, that green tint is unappealing.
Also the shadow is quite pronounced on her nose in the first one. A reflector might've helped even things out on her face; or a panel held just out of frame to shade her from direct sun.
And the sky/pavement looks quite blown out. Next time I'd try using a circular polarizer and brighter flash to keep things a little more even.
Really nice model work, though. You got her in just the right position.