system are seldom seen with digits other than 0 or 5 in the units place (hundredths of a mile); indeed, roads whose numeric designation is not divisible by 25 (one-quarter mile) are not common. Some counties, such as Hendricks end a county road's number with the digit of 1 if the road dead ends or has no outlet. One reason for implementing this grid-based numbering system related to the 9-1-1 emergency system. The grid system allows a location to be identified much more quickly and accurately than the old system of road names and rural routes. (This interpretation may seem somewhat flawed, since there can be several of the same road numbers within a few miles of each other. But while it is possible to find several different 'E100N' roads, for example, the coordinate system of road naming does enable a location to be pinpointed on a map very quickly.) Alternate grid systems are used in some counties, including systems starting at the edges of the county rather than bisecting lines. For example, Hamilton County continues the street numbering system of Indianapolis all the way across the county from south to north. 96th Street runs east–west along the Marion/Hamilton county line, and the grid continues with 10 "streets" to the mile up to 296th Street in the rural area at the Hamilton/Tipton line. North–south roads in Hamilton County have unsystematic names, although many road signs will indicate the distance east or west of the baseline along with the road name. Marshall County uses a grid that starts at the northern and eastern county lines. East–west roads are given an ordinal number (First Road, Second Road, etc.) or number and letter (1A, 3B, etc.) to indicate their distance south of the northern border, while north–south roads follow its northerly neighbor St. Joseph County's pattern and are named with tree names whose initial letter indicates the distance west of the eastern border (Apple, Beech, etc.) and with the last names of notable local people whose initial letter indicates the distance south of the northern border, although the subsequent letters are not systematic (Hawthorn is west of Hickory). Elkhart County uses a grid system like that of the state route system, except that the numbers for north–south odd-numbered roads increase west-to-east. Some counties are not gridded. Due to the geography of counties such as Dearborn and Ohio Counties, this grid system is not