This autumn I sampled the Paris cycle scheme. I never realised how small and convenient the centre of Paris is. In 10 minutes I had gone from the Gare du Nord to the Louvre. The Paris Metro and bus system is sophisticated, but for sheer convenience, cycling was a joy. Inside the peripherique you're never more than 350 yards from a bike station, so you can leave the bike at one station and pick up another one easily.

But, it's not just about bikes. Over the years Paris has modified a number of boulevards, first by widening pavements to include a cycle lane. This is clearly marked and inhibits cyclists from cycling all over the pavements. Next out there are bus and taxi lanes in either direction. Next comes a high, narrow kerb which prevents cars and vans from sneaking into the bus lanes. Finally, in the centre four lanes you find cars, lorries and buses.

It's not perfect, but as a traffic segregation system it works. It is also a powerful disincentive to car commuters, a number of whom are taking out yearly subscriptions for the cycle system, commuting by train and RER then picking up a bike for the final mile.

Edinburgh has boulevards. Why not get rid of all the parking in George Street, broaden the pavements to include cycle lanes and leave a single lane each way for cars and vans?

We have no boulevards in Glasgow city centre. The current cycle lane system is inadequate and poorly policed. We need a detailed review of all transport in Glasgow which emphasises speed of commuting, maximises the public transport option and discourages commuting by car. Putting in a lot of bike stations might please the tourists but it will do little to persuade the commuter unless they feel they can cycle conveniently and safely.
Norman McCandlish, Knockintober, Ballinluig, Perthshire.

Dr Colin Guthrie suggests making it illegal for cars to park in cycle lanes. Perhaps cyclists should consider the legality of cycling on the pavement, ignoring traffic lights and failing to warn of their approach.
Stuart Neville, 23 Lilac Avenue, Clydebank.