Amend CSSB 370 in Article 1 by adding the following appropriately numbered section to read as follows and by renumbering the remaining sections as appropriate: SECTION 1.____. (a) Subsection (b), Section 545.352, Transportation Code, is amended to read as follows: (b) Unless a special hazard exists that requires a slower speed for compliance with Section 545.351(b), the following speeds are lawful: (1) 30 miles per hour in an urban district on a street other than an alley and 15 miles per hour in an alley; (2) 70 miles per hour in daytime and 65 miles per hour in nighttime if the vehicle is a passenger car or motorcycle on a highway numbered by this state or the United States outside an urban district, including a farm-to-market or ranch-to-market road if that road has a pavement width greater than 20 feet; (3) 60 miles per hour in daytime and 55 miles per hour in nighttime if the vehicle is a passenger car or motorcycle on a highway that is: (A) outside an urban district and not a highway numbered by this state or the United States; or (B) a farm-to-market or ranch-to-market road that has a pavement width of 20 feet or less; (4) 60 miles per hour outside an urban district if a speed limit for the vehicle is not otherwise specified by this section; or (5) outside an urban district: (A) 45 miles per hour, if the vehicle is towing a house trailer of an actual or registered gross weight heavier than 4,500 pounds or larger than 32 feet, excluding the tow bar; (B) 50 miles per hour if the vehicle is a school bus; or (C) 60 miles per hour in daytime and 55 miles per hour in nighttime if the vehicle is a truck, other than a light truck, or if the vehicle is a truck tractor, trailer, or semitrailer, or a vehicle towing a trailer, semitrailer, another motor vehicle or house trailer of an actual or registered gross weight lighter than 4,500 pounds and a length of 32 feet or shorter, excluding the tow bar. (b) A change in a speed limit made by or under this section applies only to an offense committed on or after the effective date of the change. For purposes of this section, an offense was committed before the effective date of a change in a speed limit if any element of the offense occurred before that date. An offense committed before the effective date of a change in a speed limit is covered by the law in effect when the offense was committed, and the former law is continued in effect for that purpose. SECTION 1.____. Section 545.353, Transportation Code, is amended by adding Subsection (h) to read as follows: (h) A prima facie speed limit under Section 545.352(b)(3) may be increased if the commission determines from the results of an engineering and traffic investigation that a higher prima facie speed limit is reasonable and safe.