Google Undang-Undang Republik Indonesia nomor 22 tahun 2009 tentang lalu lintas dan angkutan jalan. That is the reference you should look for. It has replaced the old UU 14/1992.
I doubt that there is any translation of it. Translating a text has a cost and I am not sure that there is a market to justify the expenses to do it.
If you have a particular question, feel free to ask since I am pretty familiar with a certain number of area covered by it.