CHICAGO (CBS) — Riding a cab in Chicago is about to get a bit more expensive.

Starting tomorrow, the fuel surcharge is increasing 50 cents to $1.

The $1 surcharge on each fare is triggered when average gas prices are above $3.20 a gallon for one week. The surcharge is 50 cents when prices average more than $2.70.

The fuel surcharge was first implemented in 2008 in response to escalating gasoline prices for cab drivers.

The average price of a gallon of gasoline in Chicago stands at $3.30, according to the AAA Daily Fuel Gauge Report. The price stood at $3.25 a week ago and $3.06 a month ago.

Watch & Listen LIVE