original munkvoll depot right
world war ii show highest ridership on line through history. rationing on petrol, electric trams operated. cities without trams or trolleybuses stuck without public transport. 1940 showed increase 884,000 passengers, , first time company made profit. ridership continued increase, 1.2 million in 1941, , 2.16 million in 1945. conductors had taken use, , women employed. save time on route, stations ferstad, kyvannet, vestmarka , herlofssonløypa not served on way up. in addition, tram operated st. olavs gate hoem.
during war difficult spare parts. trams operate 3 of 4 motors, , during night there not lights on. 2 working trailers rebuilt single passenger trailer. in addition, company chose order tram , trailer skabo jernbanevognfabrikk in 1941. gb class 2 put service on 9 june 1943 , cost nok 289,000. additional 2 trailers delivered in 1947, , in 1950 motor arrived first trailer rebuilt tram.
the high revenue during war had given company large amount of cash, worn down fleet. each year, profits between nok 143,000 , 430,000. during war, company a/s ugla–lian had been bought. available cash, graakalbanen started upgrading infrastructure. turning loops built @ st. olavs gate , @ lian. in st. olavs gate, proper turning loop not feasible, , in june 1946 large loop went down dronningens gate block opened. on 13 september 1947, lian loop built, radius of 20 m (66 ft). @ same time, small garage @ lian expanded house 2 instead of 1 wagons.
on 18 july 1947, first (and only) double track section of dedicated right-of-way built. inspired oslo, suburban lines had this, 800 m (2,600 ft) rebuilt between breidablikk , nordre hoem. gave lot better regularity, since 2 trams meet anywhere along section, , both trams not become delayed if 1 was. 1949, track had been upgraded 35 kg/m, , speed increased 35 km/h (22 mph) 40 km/h (25 mph).
after war, ridership stabilized @ 1.7 million. @ first company operated 30-minute headways, using trailers during summer , in rush hour. introducing 15-minute headways not done until 6 trams available; after rebuilding of trailer tram in 1950, increased frequency introduced. during 1950s, amount of recreational travel lian decreased, compensated increased traffic new housing built along line. 1955, commuter ridership exceeded recreational ridership.
with delivery of new trailers in 1947, capacity of depot exceeded fleet, 1 tram stored @ lian. new depot therefore built on other side of tracks @ munkvoll. construction started in 1952, , finished following year. had 5 tracks; 3 had places storage of 6 wagons, while 2 workshop service 2 trams simultaneously.
to supplement aging stock, gb class 3 singe tram , trailer, hønefoss karrosserifabrikk (høka) ordered in 1954. delivered in september 1955, put service in december. because of increased traffic, new signaling system introduced in 1957, , double track built bergsli gate ila. section had been causing problems cars, since trams operate on wrong side of road. allow future 10-minute headway, new signaling system installed in 1958 ugla. until then, tokens had been used regulate traffic.
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