Tax Bonus 19% for Public Transport, up to 250 €.
In 2018 the Italian Government wants to encourage the use of public transport in order to curb traffic and pollution in big cities.

IRPEF Tax Deduction
You can deduct the 19% of public transport pass (for you and your family member) of a maximum cost of 250 €. You can use the bonus for city, regional and interregional transport pass, and just for periodical pass (not for single ticket).
The maximum deduction in other words is 47.50 € (250 x 19%).
Employee
Another incentive concerns reimbursement of public transport pass expenses; this kind of compensation, infact, shall not be treated as part of compensation of employees, so is not taxable.