[fishywang]

Turn signal would be useful. Just yesterday morning I was almost hit by a car when I was merging from bike lane to left turn lane.

[bamboozled]

You can just use your hands to indicate your intention to turn, this is done all over the world and AFAIK the accepted method of indicating without having any electronics.

[fishywang]

Yeah of course I did that, but some drivers just know nothing about cyclists. Give them something they are more familiar with would certainly help.