House committee substitute to the 2nd edition makes the following changes. Adds that for the purposes of this act, a residential street is defined as: (1) a street less than one mile long that does not connect thoroughfares or major traffic generators and does not collect traffic from more than 25 dwelling units or (2) a loop street less than 2,500 feet long. Provides that the speed limits set in the act are effective when appropriate signs are erected giving notice of the speed limit.