When you cycle, you are putting a great deal of trust into each and every car that drives by you. The same is true when you drive -- when you're driving down a

When you cycle, you are putting a great deal of trust into each and every car that drives by you. The same is true when you drive -- when you're driving down a 2 lane 45 mph road, you're putting a lot of faith in the oncoming driver to not accidentally swerve into your lane and cause a 90mph collision. The car gives you some extra protection, but you're driving much faster than you bike, which reduces that advantage.