Anecdotal from Saturday:
Just eyeballing, road traffic was down in my area about 40-50% late afternoon and evening. Foot traffic and patrons in a large restaurant and bar area was also down 50-60% from my estimates. Went to Costco to get gas around 7pm and there was virtually no cars whatsoever in the parking lot or the gas station, which was rather strange because those places are usually packed all day. The attendant at the gas station was diligently wiping down each gas terminal with cleaning materials after each car filled up. I said thanks to the guy and asked how busy it was earlier, and he said that all afternoon it was basically dead, which never happened before. Costco is still charging $2 per gallon, so those prices will be going lower as it was like $2.20 a couple weeks ago before the panic ensued.
So that's on average a 50% decline in service-related economic activity in my area, and we basically entered phase 1 of the outbreak. I am very concerned for my friends and others who work at restaurants and other places, as they aren't going to be making money soon. I won't be able risk going out for much longer though.