Cambridge is mostly pedestrian-friendly: most sights can be easily reached on foot and much of the central area is traffic-free. Do note that some of the pavements are shared use between pedestrians and cyclists; this can catch you out unless you watch out for it. Cambridge walking directions can be planned online with the walkit.com (http://www.walkit.com/cam...) walking route planner. Students and locals often use bikes to get around and hiring a bike (http://www.cam.ac.uk/camb...) is a viable alternative to simply walking.
You can also opt for a hop-on, hop-off open-top sightseeing bus which provides commentary in several languages. The sightseeing bus passes the railway station, American Cemetery, and many of the historic colleges, but as the city centre is pedestrianised, it can pproach the more central colleges on only Sundays.
There is little need to use the local bus services (http://www.stagecoachbus....) unless you are staying in a far-flung area of the city, but they are clean and efficient if you need to. Citi buses cost between £1 and £2 for individual cash fares within Cambridge City change is given but drivers may refuse large denomination notes, but just tell the driver your destination as you board and take your ticket from the machine. An all-day pass costs £3.40 for Cambridge City and Park and Ride services or £5.20 for the surrounding area.
Cambridge City Council discourages car use. Parking charges are high and the city is home to a system of rising bollards that allow vehicles with appropriate transponders e.g., taxis, buses, emergency vehicles through but can cause severe damage to other vehicles tailgating, often to the point of writing them off.
There are many taxi companies in Cambridge. Panther Taxis (http://www.panthertaxis.co.uk) are the largest and most widely used/reliable taxi company operating 24/7/365, bookings can also be made via their website; Tel: 01223 715715. Camtax claim to be Cambridge's oldest taxi company; Tel: 01223 313131. Camcab operate a 24 hour service 365 days a year; Tel: 01223 704704.