Light trails are a wonderful way to achieve "follow the lines". In theory, you could just extend the exposure time but this would extremely overexpose the rest of the picture. The far more effective way is using photoshop. Thanks to blending mode, adding light into a picture is super simple. This tutorial explains how to do this:
Sunsets in Hong Kong are rarely colorful. In this case, I waited from sunset to dark but the colors didn't turn out so well. So I decided to use the blue hour as the mainframe. The main post-processing work in this picture is to compose several images to intensify the light trails. The technic in Photoshop is quite simple. Choose pictures with intense light trails and copy them into Photoshop as new layers. Now, switch the blend mode of these layers to "lighten". If something else gets visible beside the trails, just use masking. Done! Beyond that, I removed some disturbing stuff, like the little sign on the bottom, people, and cars. In the end, the normal color, sharpness, contrast tuning, and you are done.
Like every picture, also this one started with finding the location. One of the most impressive buildings is the International Finance Centre. As Hong Kong has a lot of big roads, making walking around not that easy, I use Google Maps to find interesting perspectives. This makes it much faster and you can plan even before your trip. The bridge from where I was shooting from, I found by this method. I was just virtually driving around figuring out how to shoot the skyscraper and getting a kind of interesting foreground. The bridge is accessible via one of the one million malls next to Hong Kong station. As it is a super wide-angle sunset shot, a tripod is required. Luckily, the bridge is wide enough to accommodate me with a tripod and the Hong Kong rush hour. If shooting would be so easy everywhere, I would love it. The spot is marked in the map so check it out or even better find an even better one close by...
Canon EOS 5D Mark III, EF 11-24mm ƒ/4L @11mm, ƒ/11, 6 frames 3,2s-30s, ISO 100, on tripod, triggered by remote control