Что за Ольховатка? Эта что ли? А то у нас их как минимум две и обе вроде не совсем на берегу Дона
[map]51.92095,39.09575(ы)[/map]
Если Ольховатка эта, то прям совсем вдоль Дона лучше ехать левым берегом. На правом берегу из-за рельефа будут панорамные виды, но и дороги будут периодически уводить от воды. В целом ОСМ адекватно отражает состояние дорог. Я бы сделал вот так:
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А вот дальше не знаю, что лучше выбрать.