"The journey we have undertaken is emotionally charged and physically strenuous. The story grips me completely," Imtiaz said in a statement.
He is happy with the cast of this romantic drama, which is being shot in real locations across different parts of north India.
"Alia is responding beautifully, Randeep is a fantastic actor. I am very excited about the locations we are shooting in and it's very comforting that Sajid Nadiadwala (producer) is standing behind us," he added.
For "Highway", Imtiaz has reunited with Oscar-winning composer A.R. Rahman, who gave a mix of lilting and powerful melodies for the hugely successful musical "Rockstar".
"The grace flowed in as soon as I decided to go on this journey - Rahman sir agreed to join. I feel this movie needs him more than ever before. Then we got the ideal cast - Alia and Randeep, and the ideal crew," said Imtiaz.
Rahman said: "It's a highway journey this time; with the same good company of Imtiaz and lyricist Irshad Kamil."
Nadiadwala promises the project will be treat for fans of Rahman's music.
The film is already on the road!