This map shows the three rail routes which will be electrified in the Midlands as part of the investment.
The Midland Mainline route between London St Pancras and Bedford can already run electric trains, and the new investment will mean older diesel engines will be replaced with electric services to Kettering, Corby, Leicester, Nottingham and Derby before heading north to Sheffield.
Lines from Nuneaton South through Coventry to Leamington Spa and onto Oxford will also be electrified, as will the route from Walsall through Cannock to Rugeley.
Alison Mackenzie analyses the Government's decision to electrify the Midland Main Line as part of a nine billion pound rail investment.
Speculation is mounting over plans to electrify the Midland Mainline. The £500m scheme is expected to be announced by the Government.