Many people in Eugene travel by bicycle year round despite rainy weather. A large portion of Eugene has a grid form road system which allows bicycling along less busy roads. There are also bike lanes and signage in some areas, particularly downtown. There are several bike routes the run east-west, allowing safe travel, primarily the paths along the Willamette River and Amazon Creek. It is also possible to bike along the Amazon Parkway into south Eugene. The limited number of river crossings and lack of throughways makes bicycling into the Cal Young and River Road neighborhoods less appealing.