Addendum: Amendment to closing date. Proposals are hereby invited for the appointment of a service provider for the replacement of rails, turnouts, sleepers, lubricators, field welding and grinding of rails, manufactured crossings, repair ultrasonic defects and grinding of overlaps on turnouts and vegetation control on the Houtheuwel to Johannesburg line for a period of six (6) months in the Metrorail Gauteng Region. (Tender №89174889)