Peace Bridge, and the construction of a traffic tunnel to the Calgary International Airport, which has been completed. Nenshi's council voted to discontinue fluoridating Calgary's water supply in February 2011. As part of his campaign, Nenshi advocated to legalize "secondary housing" as a solution to housing shortage. A proposed bylaw is intended to create standardized safety requirements for the estimated 10,000–40,000 secondary suites which exist in the city. As one of the last decisions of Nenshi's term in 2013, the city motioned to waive the $4,485 application fee for rezoning of secondary suites. However, the decision will have to be brought into effect during the next government's term. In 2013 the city approved a project to convert a block of derelict heritage buildings adjacent to the Central United Church into a first-of-its-kind robotic carpark. The facility will accommodate 338 cars and incorporate the renovated buildings, which the managing firm agrees to restore. Nenshi states this will improve the aesthetics of the eyesore skid row-like buildings. The project is planned to be self-funding as Calgary firm Heritage Property Corporation will attempt to raise the $40 million through private investment. Nenshi ordered an investigation to find cost-effective solutions for a sanitary capacity issues affecting residents of northwest Calgary. If the $50 million expansion of the at-capacity Bowness sanitary line is not implemented, development in new and established communities in the quadrant may be delayed until 2017. The sanitary line also provides the town of Cochrane, contributing to the strain. Nenshi expressed distaste of the free-standing public art project entitled the "Travelling Light" completed in 2013. He described the work as "awful and not the best use of tax dollars". The sculpture was sited along Airport Trail and drivers could not appreciate the "Big O" according to Nenshi. Travelling Light is described as a balanced 17-metre circle ring topped with balanced street lights. The motif of Travelling Light is supposed to represent transportation. The sculpture cost Calgary $471,000 and was paid through a grant from the Public Art Program, which reserves 1% of the annual budget for public art projects. The sculpture approved because of Nenshi's art initiative where a percentage of all city work had to be allocated to art. Travelling Light's submission was from a German artist, although three submissions were from Calgarians. City consultation with environmental research group Mounting international, domestic, and celebrity criticism of Alberta's underdeveloped green technology infrastructure