also: つちばし
noun
earthen bridge; earth-covered bridge
A bridge made of earth or covered with earth; often a simple, rustic structure.
古い街道に土橋がかかっていた。
An earthen bridge spanned the old highway.
Compound of 土 (tsuchi/do, 'earth') and 橋 (hashi/bashi, 'bridge'). The reading どばし is a common rendaku form.