What solutions are available to you if you want to be 100% sure not to miss a train when connecting between two stations in Paris? What is more when they are far from each other. This is the case of a correspondence between the Gare de Lyon and the Gare Montparnasse , 5.6 km away for the shortest route.
You are then faced with a dilemma if your train ticket indicates too short a time frame. You can take the risk of using public transport, taking a taxi / VTC but these are more prone to disruption or traffic jams.
On its site, the SNCF offers users two different routes from Gare de Lyon to Gare Montparnasse. The first via the metro lines, with a change, and the second via the bus. In both cases, disruptions on the lines are frequent and you are not always sure of having your train. It also takes a minimum of 25 minutes to make the journey according to the SNCF. In conventional VTC / taxi, the journey can take up to 40 minutes during peak hours.