This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

In an attempt to curb air pollution in New Delhi, which gets worst during the winter, a temporary alternate-day travel scheme for cars using the odd- and even-numbered license plates system was announced by Delhi government in December 2015. In addition, trucks will be allowed to enter India's capital only after 11 p.m., two hours later than the existing restriction. The driving restriction scheme is planned to be implemented as a trial from January 1, 2016 for an initial period of 15 days. The restriction will be in force between 8 a.m. and 8 p.m., and traffic will not be restricted on Sundays. Public transportation service will be increased during the restriction period.
In what season does New Delhi's air pollution worsen?