Why a second line ?

1 - The success of the first line confirms the choice of an automatic metro for line b

A competitive metro in Rennes :
- 140, 000 trips/day registered on daily basis, with peaks of 180, 000;
- Top efficiency among French dedicated-lane public transport networks (excluding Paris, Lyon, Marseille) in the numbers of trips per kilometer of line : 3.8 million trips in 2008 (Toulouse : 3.2; Lille : 2; Nantes and Strasbourg: 1.5; Bordeaux : 1.2) (* GART 2008);
- Operating expenses and revenues balance out;
- Investment loans are now repaid.

2 - We need to address sustainable development issues

- An attractive and competitive collective transportation network is required to offer a robust alternative to car, to ensure mobility for everyone and to maintain accessibility in downtown;
- Our transportation network of tomorrow must be designed for a strong increasing population of more than 500,000 inhabitants.

3 - No other option to private car than a new dedicated-lanes transportation

Feasibility studies have clearly shown that development of mass transit system without dedicated lanes leads to a deadlock :
- Physical constraint : bus routes used by bus in city centre are saturated;
- Performance limit : no support to urban growth, traffic capped at best 95 millions of trips in 2020 (while 120 million is needed); and so, insufficient response to sustainable development issues;
- Financial limit : exponential increase of the operating deficit of the Star' network's, remain chargeable to Rennes Metropole. By balancing operating expenses and revenues, the automatic metro makes it possible to expand the transport services, without endangering, with time, the local authority's budget.

4 - The configuration of the urban area of Rennes suits to a light metro

- A city centre densely populated which needs a high capacity specific site system;
- Constraints due to unlevelled land, roads and buildings along corridor impose underground connection in downtown.