Yes you can. When you come off the expressway at Phetburi Road, turn left (it's the only way you can go). Get into the right hand lane and go for about 500 metres or so. Turn right at the lights and you are now on Sukhumvit Soi 3. Get in the far right hand lane, and when you get to the lights opposite Nana Hotel you can turn right on the correct side of the road to join the Expressway