Relating to traffic regulations; imposing a maximum length for types C and D school buses; modifying the restriction on type III school or head start buses relating to maximum manufacturer rated seating capacity, specifying certain passenger safety standards compliance requirements for vans or buses converted to a certain seating capacity and placed in service after a certain date; applying a certain provision providing for safety in highway work zones to the duties of drivers to ensure the safety of school children; providing for the cancellation of school bus driver endorsements for certain lesser offenses of driving while under the influence of alcohol or controlled substance (DWI) and authorizing commissioner of public safety waiver of permanent cancellation requirements after a certain number of years after conviction for burglary in the second, third or fourth degree (ra)