Non-recurrent Congestion: Incident Information to Motorists

Chapter 4 discussed delay reduction resulting from the decrease in response time to incidents. This chapter describes the other significant ITS approach to mitigating nonrecurrent congestion, namely providing motorists with information. Since messaging policies and diversion effects for recurrent and non-recurrent congestion may be different, these subjects are covered in this and the following chapter. For example, many agencies do not provide messages for recurrent congestion (see Chap. 6).