ViaFast (corporately styled VIAFast) was an abandoned passenger rail plan that would have cut Via Rail's trip times throughout the Quebec City–Windsor Corridor. ViaFast did not propose true high-speed service throughout the service area, but a series of smaller upgrades to avoid known bottlenecks and provide improved performance at a fraction of the price of entirely new lines. It aimed to reduce the Toronto–Montreal time by about one hour, to 3.5 hours; halving the Montreal–Quebec City time to 2 hours; and reducing Toronto–Windsor time by an hour, to 3.5 hours.