How to reach Pudong Airport at late night or early morning?

I shall stay in a hotel at 525 Sichuan north road. My flight from PVG at next day morning 6 AM. May be I have to reach airport by 4 AM.

I think start from hotel around 3 AM by taxi is the best option. How much they charge at night?

Is there any other option to reach the airport except taxi so early in the morning?

Mokraman from Singapore