About 23,350 vehicles pass through that block every 24 hours, that map says. Topeka's most heavily trafficked location overall, when highway tallies are included, is the stretch of Interstate 70 running between S.W. Fairlawn Road and S.W. US-75 highway, where about 63,400 vehicles pass through every 24 hours. KDOT takes the short-term traffic counts using rubber tubes strung across the roadway and connected to a traffic counting device, which records the number of vehicles passing over the tubes, said Kim Stich, a spokeswoman for KDOT. Whenever a vehicle drives over the tube, the traffic cou...