Finance Minister Nirmala Sitharaman on Friday said an additional excise duty and road and infrastructure cess of one rupee will be imposed on petrol and diesel. Presenting the Union Budget, she said crude prices have softened from their highs and it gives her room to review excise duty and cess on petrol and diesel.I propose to increase special additional excise duty and road and infrastructure cess each by one rupee a litre on petrol and diesel, she said.On Friday, petrol and diesel were being retailed for Rs 64.33 and Rs 70.51 a litre respectively in Delhi. In Mumbai, petrol and diesel were priced at Rs 67.40 a litre and Rs 76.15 a litre. Domestic fuel prices have barely changed this year. Rates of petrol and diesel have risen merely Rs 1.67 and Rs 1.86 a litre respectively since January 1. Meanwhile, crude oil rates have risen about $9 a barrel, or 17%, this year from a low of $53.8 at the beginning of the year to $63 a barrel now. Crude touched $75 in April.