Rome undertakes work to connect Metro B to Metro C at Colosseum.

Construction works to connect Rome's Metro C with the Metro B station at the Colosseum will result in the Laurentina-Castro Pretorio section of the city's B line closing at 21.00 for three months.

The early closures will be in place from 9 September until 7 December, with the stations between Laurentina and Castro Pretorio closing at 21.00 instead of 23.30.

This section of the B line, comprising 13 stations including Colosseo and Termini, will also close completely for five weekends: 21-22 and 28-29 September, and 5-6, 12-13 and 26-27 October.

Substitute buses will be available for the duration of the works which are to allow for the creation of a tunnel connecting the existing Colosseo station on the B line to the new Fori Imperiali station on the Metro C, whose opening is scheduled in 2023.

More early closing times are expected in 2020, from February until June, and again during the summer of 2021.

Metro C is a driverless 19-km line which currently comprises 22 stations. It runs from Pantono in east Rome to S. Giovanni, where it connects with Metro A and Termini.

The connection at the Colosseum is crucial as it would see Rome's third subway connect to Metro B.

News of the upcoming Metro B closures coincides with the reactivation of the entire Metro A line on 26 August, following partial closures caused by upgrading works over the summer.