When stop signs are installed where the need to control right-of-way is questionable, there would be an increase in traffic delay and congestion with little or no gain in safety. In fact, safety is sometimes reduced. The number of rear-end accidents sometimes increases and pedestrian accidents may increase because of a false sense of security provided by the stop sign. Excessive use of stop signs tends to frustrate and anger motorists, who may divert to less suitable streets. If the motorist consistently observes that the cross street traffic is light or non-existent, the stop sign's installation will be questioned by the motorist, and he/she will frequently roll through or run the stop sign, thus reducing the credibility of stop signs. In some cases, this can occur up to 25% of the time.