You like the convenience of your car, however considering the amount of emissions your traveling to work creates, perhaps it is time to go public?
Is there a bus stop near your office? Or perhaps a train station? Maybe there is a ferry, tramcar or even a monorail nearby?
To encourage your employees to take public transport, perhaps you could set an example by doing it yourself first; suggesting that people can meet at the train station or bus depot and travel in together; or if your staff travel with laptops you could even allow any work done on the way as part of the day’s work?